JP2015075560A - Lipophilic laminate, manufacturing method therefor, and articles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lipophilic laminate which is finger-print resistant and capable of preventing interference fringes.SOLUTION: A lipophilic laminate includes a resin base material, at least one intermediate layer formed on the resin base material, and a lipophilic resin layer formed on the intermediate layer, the lipophilic resin layer having either fine protrusions or recesses on a surface thereof. A difference between a refractive index of the lipophilic resin layer and that of the intermediate layer abutting the lipophilic resin layer is greater than zero, and a surface of the lipophilic resin layer has an oleic acid contact angle of 10° or less.

Description

  The present invention relates to a lipophilic laminate, a method for producing the same, and an article using the lipophilic laminate.

  If fingerprints adhere to the surface of the article, the aesthetics of the article are impaired. For example, if fingerprints adhere to the surfaces of pianos, luxury furniture, home appliances, automobile interior / exterior parts, etc., the aesthetics are impaired and it becomes unsightly.

  Further, when a fingerprint is attached to the surface of the article, optical characteristics such as visibility are deteriorated. For example, the touch panel of an information display device such as a smartphone or a tablet PC equipped with a touch panel as a user interface (UI) has an advantage that the device can be intuitively operated by directly touching the display screen with a finger. However, when a fingerprint is attached to the touch panel, the visibility of the screen is lowered.

Therefore, for example, an antifouling layer designed so that a fluorine-based compound, a silicone-based compound, or the like appears on the outermost surface as a display surface of a touch panel or the like has been proposed (see, for example, Patent Document 1). The proposed technique has an effect of facilitating wiping with a cloth or the like by forming a water- and oil-repellent surface to weaken the adhesion of the oil and fat components constituting the fingerprint.
However, unless the fingerprint is wiped off with a cloth or the like, the oil and fat component is repelled on the surface of the layer, so that there is a problem that droplets are formed, light is scattered, and the fingerprint becomes conspicuous.
Therefore, there is a demand for fingerprint resistance that is difficult to see even when a fingerprint is attached.

  By the way, in the optical material, the laminated body which formed the fine uneven | corrugated pattern (moth eye structure) on the surface is proposed for the purpose of reflection prevention of light. This proposed technique prevents light reflection by continuously changing the refractive index of incident light and eliminating the discontinuous interface of the refractive index.

  The antireflection article having a moth-eye structure has a problem that interference fringes are generated due to the interface between the layer forming the moth-eye structure and another layer. Therefore, a technique for reducing interference fringes in an antireflection article having a moth-eye structure has been proposed (see, for example, Patent Document 2).

  Interference fringes may also occur in articles that make fingerprints inconspicuous. However, since the moth-eye structure in the antireflection article is different from the surface structure in the article that makes the fingerprint inconspicuous, the technique for reducing the interference fringes in the antireflection article can be applied to the article that makes the fingerprint inconspicuous. Is not limited.

  Accordingly, the present situation is that there is a demand for providing an oleophilic laminate having fingerprint resistance and preventing interference fringes, a manufacturing method thereof, and an article using the oleophilic laminate.

Japanese Patent No. 4666667 JP2012-128168A

  An object of the present invention is to solve the above-described problems and achieve the following objects. That is, an object of the present invention is to provide an oleophilic laminate having fingerprint resistance and preventing interference fringes, a method for producing the same, and an article using the oleophilic laminate.

Means for solving the problems are as follows. That is,
<1> a resin base material, at least one intermediate layer on the resin base material, and a lipophilic resin layer on the intermediate layer,
The lipophilic resin layer has either a fine convex part or a concave part on the surface,
The difference between the refractive index of the lipophilic resin layer and the refractive index of the intermediate layer in contact with the lipophilic resin layer is greater than 0,
The oleic acid contact angle on the surface of the lipophilic resin layer is 10 ° or less.
<2> The lipophilic laminate according to <1>, wherein the difference between the refractive index of the resin base material and the refractive index of the intermediate layer in contact with the resin base material is 0.03 to 0.1. is there.
<3> The difference between the refractive index of the lipophilic resin layer and the refractive index of the intermediate layer in contact with the lipophilic resin layer is 0.01 to 0.06, and any one of <1> to <2> It is a lipophilic laminated body of description.
<4> The lipophilic laminate according to any one of <1> to <3>, wherein the total thickness of the lipophilic resin layer and the average thickness of the intermediate layer is 2.0 μm to 13.0 μm. is there.
<5> The lipophilic laminate according to any one of <1> to <4>, wherein the oleic acid contact angle on the surface of the lipophilic resin layer is 5.0 ° or less.
<6> The resin base material is made of a triacetyl cellulose (TAC) film, a polyethylene terephthalate (PET) film, a polycarbonate (PC) film, a polymethyl methacrylate (PMMA) film, and a PC / PMMA laminate. The lipophilic laminate according to any one of <1> to <5>.
<7> The lipophilic laminate according to any one of <1> to <6>, wherein the intermediate layer has 1 to 3 layers.
<8> The method for producing a lipophilic laminate according to any one of <1> to <7>,
An uncured resin layer forming step of forming an uncured resin layer by applying an active energy ray-curable resin composition on the intermediate layer;
Adhering a transfer master having either a fine convex part or a concave to the uncured resin layer, irradiating the uncured resin layer to which the transfer master is in contact with an active energy ray to cure the uncured resin layer And a lipophilic resin layer forming step of forming a lipophilic resin layer by transferring any one of the fine convex portions and concave portions.
<9> The parent according to <8>, wherein any one of the fine convex portion and the concave portion of the transfer master is formed by etching the surface of the transfer master using a photoresist having a predetermined pattern shape as a protective film. It is a manufacturing method of an oil-based laminated body.
<10> The lipophilic laminate according to <8>, wherein any one of the fine convex portion and the concave portion of the transfer master is formed by irradiating the surface of the transfer master with laser processing of the transfer master. It is a manufacturing method of a body.
<11> An article having a lipophilic laminate according to any one of <1> to <7> on a surface thereof.

  According to the present invention, the conventional problems can be solved, the object can be achieved, the fingerprint resistance and the interference fringes can be prevented, the manufacturing method thereof, and the parent An article using an oily laminate can be provided.

FIG. 1A is an atomic force microscope (AFM) image showing an example of the surface of a lipophilic resin layer having convex portions. 1B is a cross-sectional view taken along the line aa in FIG. 1A. FIG. 1C is an AFM image (three-dimensional image) of the lipophilic resin layer in FIG. 1A. FIG. 1D is a scanning electron microscope image (SEM image) of the lipophilic resin layer of FIG. 1A. FIG. 2A is an AFM image showing an example of the surface of a lipophilic resin layer having a recess. 2B is a cross-sectional view taken along line aa in FIG. 2A. FIG. 3A is a perspective view illustrating an example of a configuration of a roll master that is a transfer master. 3B is an enlarged plan view showing a part of the roll master shown in FIG. 3A. 3C is a cross-sectional view of the track T in FIG. 3B. FIG. 4 is a schematic diagram showing an example of the configuration of a roll master exposure apparatus for producing a roll master. FIG. 5A is a process diagram for explaining an example of a process for producing a roll master. FIG. 5B is a process diagram for explaining an example of a process for producing a roll master. FIG. 5C is a process diagram for explaining an example of a process for producing a roll master. FIG. 5D is a process diagram for explaining an example of a process for producing a roll master. FIG. 5E is a process diagram for explaining an example of a process for producing a roll master. FIG. 6A is a process diagram for explaining an example of a process of transferring fine convex portions or concave portions by a roll master. FIG. 6B is a process diagram for explaining an example of a process of transferring a fine convex portion or a concave portion with a roll master. FIG. 6C is a process diagram for explaining an example of a process of transferring a fine convex portion or a concave portion with a roll master. FIG. 7A is a plan view illustrating an example of a configuration of a plate-shaped master that is a transfer master. FIG. 7B is a cross-sectional view taken along the line aa shown in FIG. 7A. FIG. 7C is an enlarged cross-sectional view of a part of FIG. 7B. FIG. 8 is a schematic diagram showing an example of the configuration of a laser processing apparatus for producing a plate-shaped master. FIG. 9A is a process diagram for explaining an example of a process for producing a plate-shaped master. FIG. 9B is a process diagram for explaining an example of a process for producing a plate-shaped master. FIG. 9C is a process diagram for explaining an example of a process for producing a plate-shaped master. FIG. 10A is a process diagram for explaining an example of a process of transferring fine convex portions or concave portions with a plate-shaped master. FIG. 10B is a process diagram for explaining an example of a process of transferring fine convex portions or concave portions by a plate-shaped master. FIG. 10C is a process diagram for explaining an example of a process of transferring a fine convex portion or a concave portion with a plate-shaped master. FIG. 11: is a schematic sectional drawing of an example of the lipophilic laminated body manufactured by 4th Embodiment. FIG. 12A is a process diagram for explaining an example of producing the article of the present invention by in-mold molding. FIG. 12B is a process diagram for explaining an example of producing the article of the present invention by in-mold molding. FIG. 12C is a process diagram for explaining an example of manufacturing the article of the present invention by in-mold molding. FIG. 12D is a process diagram for explaining an example of manufacturing the article of the present invention by in-mold molding. FIG. 12E is a process diagram for explaining an example of manufacturing the article of the present invention by in-mold molding. FIG. 12F is a process diagram for explaining an example of manufacturing the article of the present invention by in-mold molding. 13A is an AFM image of the surface of the lipophilic resin layer of the lipophilic laminate of Example 1. FIG. 13B is a cross-sectional view taken along the line aa in FIG. 13A. FIG. 13C is an AFM image (three-dimensional image) of the lipophilic resin layer in FIG. 13A. FIG. 13D is a scanning electron microscope image (SEM image) of the lipophilic resin layer in FIG. 13A. 14A is an AFM image of the surface of the lipophilic resin layer of the lipophilic laminate of Example 8. FIG. 14B is a cross-sectional view taken along line aa in FIG. 14A. FIG. 14C is an AFM image (three-dimensional image) of the lipophilic resin layer in FIG. 14A. FIG. 15A is an AFM image of the surface of the lipophilic resin layer of the lipophilic laminate of Example 9. 15B is a cross-sectional view taken along line aa in FIG. 15A. FIG. 15C is an AFM image (three-dimensional image) of the lipophilic resin layer in FIG. 15A. 16A is an AFM image of the surface of the lipophilic resin layer of the lipophilic laminate of Example 10. FIG. 16B is a cross-sectional view taken along the line aa in FIG. 16A. FIG. 16C is an AFM image (three-dimensional image) of the lipophilic resin layer in FIG. 16A. FIG. 17A is an AFM image of the surface of the lipophilic resin layer of the lipophilic laminate of Example 11. FIG. 17B is a cross-sectional view taken along the line aa in FIG. 17A. FIG. 17C is an AFM image (three-dimensional image) of the lipophilic resin layer in FIG. 17A.

(Lipophilic laminate)
The lipophilic laminate of the present invention has at least a resin substrate, at least one intermediate layer, and a lipophilic resin layer, and further includes other members as necessary.

The said lipophilic resin layer has either a fine convex part and a recessed part on the surface.
The difference between the refractive index of the lipophilic resin layer and the refractive index of the intermediate layer in contact with the lipophilic resin layer is greater than zero.
The oleic acid contact angle on the surface of the lipophilic resin layer is 10 ° or less.

  The fingerprint resistance in the present invention means a characteristic that is difficult to see even when a fingerprint is attached.

<Resin base material>
There is no restriction | limiting in particular as a material of the said resin-made base materials, According to the objective, it can select suitably, For example, a triacetyl cellulose (TAC), polyester (TPEE), a polyethylene terephthalate (PET), a polyethylene naphthalate ( PEN), polyimide (PI), polyamide (PA), aramid, polyethylene (PE), polyacrylate, polyether sulfone, polysulfone, polypropylene (PP), polystyrene, diacetyl cellulose, polyvinyl chloride, polymethyl methacrylate (PMMA) , Polycarbonate (PC), epoxy resin, urea resin, urethane resin, melamine resin, phenol resin, acrylonitrile-butadiene-styrene copolymer, cycloolefin polymer (COP), cycloolefin copolymer Mer (COC), PC / PMMA laminate, such as rubber additives PMMA and the like.

  The resin base material preferably has transparency.

There is no restriction | limiting in particular as a shape of the said resin-made base materials, Although it can select suitably according to the objective, It is preferable that it is a film form.
When the resin base material is in the form of a film, the average thickness of the resin base material is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 5 μm to 1,000 μm, preferably 50 μm to 500 μm. Is more preferable.

  As the resin substrate, a triacetyl cellulose (TAC) film, a polyethylene terephthalate (PET) film, a polycarbonate (PC) film, a polymethyl methacrylate (PMMA) film, and a PC / PMMA laminate are preferable.

  Characters, patterns, images, and the like may be printed on the surface of the resin substrate.

<Intermediate layer>
The intermediate layer is formed on the resin base material.
By providing the intermediate layer on the lipophilic laminate, interference fringes can be prevented.

  There is no restriction | limiting in particular as the number of the said intermediate | middle layer, Although it can select suitably according to the objective, 1 layer-3 layers are preferable.

The difference between the refractive index of the resin base material and the refractive index of the intermediate layer in contact with the resin base material is not particularly limited and can be appropriately selected depending on the purpose. From the point which is easy to be exhibited, 0.03-0.1 are preferable.
When the resin substrate has a multilayer structure, the refractive index of the layer on the side in contact with the intermediate layer in the multilayer structure is the refractive index used for the calculation of the difference.

  The difference between the refractive index of the oleophilic resin layer and the refractive index of the intermediate layer in contact with the oleophilic resin layer is not particularly limited as long as it is greater than 0, and can be appropriately selected according to the purpose. From the point that the interference fringe reduction effect is easily exhibited, 0.01 to 0.06 is preferable.

  The plurality of intermediate layers preferably have different refractive indexes.

  The intermediate layer can be formed, for example, by applying an active energy ray-curable resin composition. As the active energy ray-curable resin composition, for example, an active energy ray-curable resin composition containing at least urethane (meth) acrylate and a photopolymerization initiator, and further containing other components as necessary. Such as things. Examples of the urethane (meth) acrylate and the photopolymerization initiator include the bifunctional urethane (meth) acrylate and the photopolymerization initiator exemplified in the description of the lipophilic resin layer described later.

  The intermediate layer can be formed, for example, by applying a thermosetting resin composition.

  The method for applying the active energy ray curable resin composition and the thermosetting resin composition is not particularly limited and may be appropriately selected depending on the purpose. For example, wire bar coating, blade coating, spin coating Examples thereof include coating, reverse roll coating, die coating, spray coating, roll coating, gravure coating, micro gravure coating, lip coating, air knife coating, curtain coating, comma coating method, and dipping method.

  The refractive index of the intermediate layer can be adjusted by appropriately selecting the type of material forming the intermediate layer.

  There is no restriction | limiting in particular as average thickness of the said intermediate | middle layer, Although it can select suitably according to the objective, 0.01 micrometer-20.0 micrometers are preferable, 0.1 micrometer-10.0 micrometers are more preferable, 0.5 micrometer ˜10.0 μm is particularly preferred.

-Refractive index-
The refractive index in this specification can be measured by the following method, for example.
The thickness of the sample intermediate layer and the lipophilic resin layer is determined by observing the cross section of the composition with SEM (manufactured by JEOL, JSM-6510A).
Next, the surface reflection spectrum of the sample is measured by an F20 film thickness measurement system manufactured by Filmetrics.
Finally, the refractive index is calculated from the film thickness measured by SEM and the reflection spectrum using FILMeasurement thin film measurement software (Ver. 2.4.3) manufactured by Filmetrics, in which the following analysis method is programmed.

The analysis method is as follows.
Consider the reflected light when light is irradiated vertically to a sample in which a thin film is formed on a substrate. In this case, light is reflected on both the upper surface and the lower surface of the thin film, and the amount of reflected light is the sum of these two reflected lights. Reflected light from these two interfaces is strengthened or weakened depending on the optical path difference. The mutual optical path difference is determined by the film thickness d and the refractive index n of the thin film. When the optical path difference is an integer multiple of the wavelength, the two reflected lights are added in phase and intensified. When light enters at a right angle to the transparent film, this phenomenon occurs when 2nd = mλ (m is an integer). On the other hand, when the wavelength is shifted by ½ wavelength from the in-phase state, that is, when 2nd = (m + 1/2) λ, the two reflected lights are subtracted in the direction of canceling each other. From these, the total reflection spectrum can be expressed by the following one equation.
The refractive index n is obtained by fitting the reflection spectrum using this equation and the actually measured film thickness. The above analysis method is a principle and may be slightly different from the method actually used. Here, R is a reflectance, and A and B are constants.

<Lipophilic resin layer>
The said lipophilic resin layer has either a fine convex part and a recessed part on the surface.
The oleic acid contact angle on the surface of the lipophilic resin layer is 10 ° or less.
The lipophilic resin layer is formed on the intermediate layer.

  There is no restriction | limiting in particular as said lipophilic resin layer, Although it can select suitably according to the objective, It is preferable to contain the hardened | cured material of an active energy ray curable resin composition.

-Fine convex portions and fine concave portions-
The said lipophilic resin layer has either a fine convex part and a recessed part on the surface.
Either the fine convex part or the concave part is formed on the surface opposite to the intermediate layer side in the lipophilic resin layer.

Here, a fine convex part means that the average distance of an adjacent convex part is 1,000 nm or less in the surface of the said lipophilic resin layer.
Here, the fine recess means that the average distance between adjacent recesses is 1,000 nm or less on the surface of the lipophilic resin layer.

  The shape of the convex portion and the concave portion is not particularly limited and can be appropriately selected depending on the purpose. For example, a cone shape, a column shape, a needle shape, or a partial shape of a sphere (for example, a hemisphere) Shape), a partial shape of an ellipsoid (for example, a semi-ellipsoidal shape), and a polygonal shape. These shapes need not be mathematically defined complete shapes, and may have some distortion.

  The convex portion or the concave portion is two-dimensionally arranged on the surface of the lipophilic resin layer. The arrangement may be a regular arrangement or a random arrangement. The regular arrangement is preferably a close-packed structure from the viewpoint of the filling rate.

There is no restriction | limiting in particular as an average distance of the said adjacent convex part, Although it can select suitably according to the objective, 5 nm-1,000 nm are preferable, 10 nm-800 nm are more preferable, 50 nm-500 nm are especially preferable.
There is no restriction | limiting in particular as an average distance of the said adjacent recessed part, Although it can select suitably according to the objective, 5 nm-1,000 nm are preferable, 10 nm-800 nm are more preferable, 50 nm-500 nm are especially preferable.
When the average distance between the adjacent convex portions and the average distance between the adjacent concave portions are within the preferable range, the fingerprint component adhering to the lipophilic resin layer is effectively spread. In addition, the fingerprint wiping property is improved. When the average distance is within the particularly preferable range, the effect of spreading the fingerprint component and the effect of improving the fingerprint wiping property become remarkable.

There is no restriction | limiting in particular as average height of the said convex part, Although it can select suitably according to the objective, 1 nm-1,000 nm are preferable, 5 nm-500 nm are more preferable, 10 nm-300 nm are still more preferable, 10 nm ˜150 nm is particularly preferred.
There is no restriction | limiting in particular as an average depth of the said recessed part, Although it can select suitably according to the objective, 1 nm-1,000 nm are preferable, 5 nm-500 nm are more preferable, 10 nm-300 nm are still more preferable, 10 nm- 150 nm is particularly preferred.
When the average height of the convex portions and the average depth of the concave portions are within the preferable range, the fingerprint component attached to the lipophilic resin layer effectively wets and spreads. In addition, the fingerprint wiping property is improved.
When the average height and the average depth are within the particularly preferable range, the effect of spreading the fingerprint component and the effect of improving the fingerprint wiping property become remarkable.

As the average aspect ratio of the convex part (average height of the convex part / average distance of the adjacent convex part) and the average aspect ratio of the concave part (average depth of the concave part / average distance of the adjacent concave part) There is no particular limitation, and it can be appropriately selected according to the purpose. However, 0.001 to 1,000 is preferable, 0.01 to 50 is more preferable, and 0.04 to 3.0 is particularly preferable.
When the average aspect ratio of the convex portions and the average aspect ratio of the concave portions are within the preferable range, the fingerprint component attached to the lipophilic resin layer is effectively spread by wetting. In addition, the fingerprint wiping property is improved. When the aspect ratio is within the particularly preferable range, the effect of spreading the fingerprint component and the effect of improving the fingerprint wiping property become remarkable.

Here, the average distance (Pm) of the convex part or the concave part, and the average height of the convex part or the average depth (Hm) of the concave part can be measured as follows.
First, the surface S of the lipophilic resin layer having a convex portion or a concave portion is observed with an atomic force microscope (AFM), and the pitch of the convex portion or the concave portion and the height of the convex portion are determined from the cross-sectional profile of the AFM. Or the depth of a recessed part is calculated | required. This is repeated at 10 locations randomly selected from the surface of the lipophilic resin layer, and the pitches P1, P2,..., P10 and the heights or depths H1, H2,. Ask for.
Here, the pitch of the convex portions is a distance between the vertices of the convex portions. The pitch of the recesses is the distance between the deepest portions of the recesses. The height of the convex portion is the height of the convex portion based on the lowest point of the valley between the convex portions. The depth of the recess is the depth of the recess based on the highest point of the peak between the recesses.
Next, these pitches P1, P2,..., P10 and the heights or depths H1, H2,..., H10 are simply averaged (arithmetic average), and the average distance between the convex portions or the concave portions is calculated. (Pm) and the average height of the convex portions or the average depth (Hm) of the concave portions are obtained.
In addition, when the pitch of the said convex part or a recessed part has in-plane anisotropy, the said Pm shall be calculated | required using the pitch of the direction where a pitch becomes the maximum. Further, when the height of the convex portion or the depth of the concave portion has in-plane anisotropy, the height or depth in the direction in which the height or depth is maximum is used. Is to be sought.
Moreover, when the said convex part or a recessed part is rod-shaped, the pitch of a short axis direction is measured as said pitch.
In the AFM observation, the cross-sectional profile is a measurement target so that the convex vertex or concave base of the cross-sectional profile matches the vertex of the solid convex portion or the deepest portion of the concave portion. It cuts out so that it may become a cross section which passes through the top of a convex part of a solid shape, or the deepest part of a concave part of a solid shape.

Here, it can be determined as follows whether the fine shape formed on the surface of the lipophilic resin layer is a convex portion or a concave portion.
The surface S of the lipophilic resin layer having a convex portion or a concave portion is observed with an atomic force microscope (AFM) to obtain a cross section and an AFM image of the surface S.
When the AFM image of the surface is a bright image on the outermost surface side and a dark image on the deep side, when the bright image is formed in an island shape in the dark image, the surface has a convex portion. Shall.
On the other hand, when a dark image is formed in an island shape in a bright image, the surface thereof has a recess.
For example, the surface of the lipophilic resin layer having the AFM image of the surface and cross section shown in FIGS. 1A and 1B has a convex portion. A three-dimensional image of the lipophilic resin layer having the AFM images of the surface and the cross section shown in FIGS. 1A and 1B is as shown in FIG. 1C. The surface shown in FIGS. 2A and 2B and the surface having a cross-sectional AFM image have a recess.

  It is preferable that the said convex part or the said recessed part which adjoins is spaced apart. The average distance of the separation (average separation distance) is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 1 nm to 999 nm, more preferably 5 nm to 795 nm, still more preferably 10 nm to 490 nm, 100 nm to 190 nm is particularly preferable. When the average separation distance is within the preferable range, the fingerprint component adhering to the lipophilic resin layer is effectively wetted and spread. In addition, the fingerprint wiping property is improved. When the average separation distance is within the particularly preferable range, the effect of spreading the fingerprint component and the effect of improving the fingerprint wiping property become remarkable.

Here, the average separation distance (Dm) of the convex portions or the concave portions that are separated can be measured as follows.
First, the surface S of the lipophilic resin layer is observed with a scanning electron microscope (SEM), and the distance between adjacent convex portions or concave portions is determined from the surface SEM image. The separation distance is the shortest distance between the outer edges of adjacent convex portions or concave portions when the surface S is viewed from above. The measurement is repeatedly performed at 10 points randomly selected from the surface of the lipophilic resin layer, and the separation distances D1, D2,.
Next, these separation distances D1, D2,..., D10 are simply averaged (arithmetic average) to obtain the average separation distance (Dm) of the convex portions or concave portions.
For example, FIG. 1D shows an SEM photograph of a lipophilic resin layer having AFM images of the surface and cross section shown in FIGS. 1A and 1B. In FIG. 1D, the pitch (P) of the convex portions is 310 nm, and the separation distance (D) of the convex portions is 170 nm.

-Oleic acid contact angle-
The oleic acid contact angle on the surface of the lipophilic resin layer is 10 ° or less, preferably 5.0 ° or less, and more preferably 3.0 ° or less. There is no restriction | limiting in particular as a lower limit of the said oleic acid contact angle, According to the objective, it can select suitably, For example, 1.0 degree etc. are mentioned.
The oleic acid contact angle can be measured under the following conditions using, for example, PCA-1 (manufactured by Kyowa Interface Chemical Co., Ltd.).
Oleic acid is put in a plastic syringe, a Teflon-coated needle is attached to the tip, and the oleic acid is dropped on the evaluation surface.
Drip amount of oleic acid: 1 μL
Measurement temperature: 25 ° C
The contact angle after 100 seconds has elapsed after dropping oleic acid is measured at any 10 locations on the surface of the lipophilic resin layer, and the average value is taken as the oleic acid contact angle.

  The oleic acid contact angle on the surface of the oleophilic resin layer is preferably reduced with time when the oleic acid contact angle is measured. Between 20 seconds and 100 seconds after dropping oleic acid, 1 More preferably, the angle is smaller than 0.0 °, and particularly preferably smaller than 2.0 °. By doing so, the wiping property of the attached fingerprint by a finger, tissue, cloth or the like is improved.

-Active energy ray-curable resin composition-
The active energy ray-curable resin composition is not particularly limited and may be appropriately selected depending on the intended purpose as long as the desired oleic acid contact angle can be achieved in the lipophilic resin layer formed after curing. Examples thereof include an active energy ray-curable resin composition containing at least a polyfunctional (meth) acrylic monomer and a photopolymerization initiator, and further containing other components as necessary.

--Polyfunctional (meth) acrylic monomer--
Examples of the polyfunctional (meth) acrylic monomer include 1,3-butylene glycol diacrylate, diethylene glycol diacrylate, neopentyl glycol diacrylate, tripropylene glycol diacrylate, ethoxylated (3) bisphenol A diacrylate, and dipropylene. Glycol diacrylate, acrylate ester (dioxane glycol diacrylate), ethoxylated (4) bisphenol A diacrylate, isocyanuric acid EO-modified diacrylate, tricyclodecane dimethanol diacrylate, ethylene glycol dimethacrylate, 1,4-butanediol di Methacrylate, diethylene glycol dimethacrylate, 1,12-dodecanediol dimethacrylate, 1,3-butyleneglycol Dimethacrylate, ethoxylated (4) bisphenol A dimethacrylate, and the like ethoxylated (6) bisphenol A dimethacrylate. These may be used individually by 1 type and may use 2 or more types together.

  Moreover, as said polyfunctional (meth) acryl monomer, bifunctional urethane (meth) acrylate, bifunctional epoxy (meth) acrylate, bifunctional polyester (meth) acrylate, etc. are mentioned, for example.

  A commercial item may be sufficient as the said bifunctional urethane (meth) acrylate. Examples of the commercially available products include CN940, CN963, CN963A80, CN963B80, CN963E75, CN963E80, CN982A75, CN982B88, CN983, CN985C, CN901, CN9711, CN97C, CN97C, C97 Examples include EBECRYL 284 manufactured by company, AT-600, UF-8001G manufactured by Kyoeisha Chemical Co., Ltd., and the like.

  A commercial item may be sufficient as the said bifunctional epoxy (meth) acrylate. Examples of the commercially available products include CN104, CN104A80, CN104B80, CN104D80, CN115, CN117, CN120, CN120A75, CN120B60, CN120B80, CN120C60, CN120C80, CN120D80, CN120E50, CN120E50, CN120E50, CN120E50, E UVE150 / 80, CN2100, EBECRYL 600, EBECRYL 605, EBECRYL 3700, EBECRYL 3701, EBECRYL 3702, EBECRYL 3703, 70FA, 300A, etc. made by Kyoeisha Chemical Co., Ltd. .

  A commercial item may be sufficient as the said bifunctional polyester (meth) acrylate. Examples of the commercially available products include CN2203 and CN2272 manufactured by Sartomer.

There is no restriction | limiting in particular as glass transition temperature (Tg) of the said polyfunctional (meth) acryl monomer, Although it can select suitably according to the objective, It is preferable that it is 50 degreeC or more. For example, the Tg is prepared by blending 5 parts by mass of the polymerization initiator with respect to 100 parts by mass of the polyfunctional (meth) acrylic monomer, and using a mercury lamp to irradiate ultraviolet rays with a dose of 1,000 mJ / cm ² The cured product obtained as described above can be used as a test piece, and can be obtained by a differential scanning calorimeter or a thermomechanical analyzer.

  There is no restriction | limiting in particular as content of the said polyfunctional (meth) acryl monomer in the said active energy ray curable resin composition, Although it can select suitably according to the objective, 15.0 mass%-99.9 % By mass is preferable, 50.0% by mass to 99.0% by mass is more preferable, and 75.0% by mass to 98.0% by mass is particularly preferable.

-Photopolymerization initiator-
Examples of the photopolymerization initiator include a photoradical polymerization initiator, a photoacid generator, a bisazide compound, hexamethoxymethylmelamine, and tetramethoxyglycolyl.
The radical photopolymerization initiator is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include ethoxyphenyl (2,4,6-trimethylbenzoyl) phosphine oxide and bis (2,6-dimethylbenzoyl). ) -2,4,4-trimethylpentylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -2,4,4-trimethylpentylphosphine oxide, bis (2,6-dichlorobenzoyl) -2 , 4,4-trimethylpentylphosphine oxide, 1-phenyl 2-hydroxy-2methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane -1-one, 1,2-diphenylethanedione, methylphenylglycone Kishireto and the like.

  There is no restriction | limiting in particular as content of the said photoinitiator in the said active energy ray curable resin composition, Although it can select suitably according to the objective, 0.1 mass%-10 mass% are preferable, 0.5 mass%-8 mass% are more preferable, and 1 mass%-5 mass% are especially preferable.

-Other ingredients-
There is no restriction | limiting in particular as said other component, According to the objective, it can select suitably, For example, a filler etc. are mentioned.

The filler may be used to adjust the elongation rate, hardness and the like of the lipophilic resin layer.
The filler is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include silica, zirconia, titania, tin oxide, indium tin oxide, antimony-doped tin oxide, and antimony pentoxide. Examples of the silica include solid silica and hollow silica.

  The active energy ray-curable resin composition can be diluted with an organic solvent when used. Examples of the organic solvent include aromatic solvents, alcohol solvents, ester solvents, ketone solvents, glycol ether solvents, glycol ether ester solvents, chlorine solvents, ether solvents, N-methylpyrrolidone, and dimethyl. Examples include formamide, dimethyl sulfoxide, dimethylacetamide, and the like.

  The active energy ray-curable resin composition is cured when irradiated with active energy rays. There is no restriction | limiting in particular as said active energy ray, According to the objective, it can select suitably, For example, an electron beam, an ultraviolet-ray, infrared rays, a laser beam, visible light, ionizing radiation (X ray, alpha ray, beta ray, gamma) Wire, etc.), microwave, high frequency and the like.

The Martens hardness of the lipophilic resin layer is not particularly limited and may be appropriately selected depending on the intended ^purpose, but is preferably ^{50N / mm 2 ~300N / mm 2} , 100N / mm 2 ~250N / mm 2 is more ^{preferably, 150N / mm 2 ~230N / mm} 2 is particularly preferred. When molding the lipophilic laminate, for example, during the injection molding of polycarbonate, the lipophilic laminate is heated and pressurized at 290 ° C. and 200 MPa. At this time, either the fine convex part or the concave part on the surface of the lipophilic resin layer may be deformed. Examples of the deformation include a decrease in the height of the fine convex portion and a decrease in the depth of the fine concave portion. Although it may be deformed as long as it does not affect the fingerprint resistance, if it is deformed too much, the contact angle of oleic acid increases and the fingerprint resistance decreases. When the Martens hardness is less than 50 N / mm ² , when the lipophilic laminate is molded, one of the fine convex portions and concave portions on the surface of the lipophilic resin layer is excessively deformed, and olein The acid contact angle is increased and fingerprint resistance is reduced, and the lipophilic resin layer is subjected to surface cleaning during normal use, such as handling and surface cleaning when manufacturing or molding the lipophilic laminate. Scratches can easily occur. When the Martens hardness exceeds 300 N / mm ² , cracks may occur in the lipophilic resin layer or the lipophilic resin layer may be peeled off during molding. When the Martens hardness is within the particularly preferable range, the lipophilic laminate can be variously three-dimensionally produced without reducing fingerprint resistance and without causing defects such as scratches, cracks, and peeling. This is advantageous in that it can be easily formed into a shape.
In addition, since high temperature and high pressure are applied to the lipophilic resin layer in the injection molding process after molding the lipophilic laminate, the Martens hardness of the lipophilic resin layer may be higher than before the molding process.
The Martens hardness can be measured by using, for example, PICODETOR HM500 (trade name; manufactured by Fisher Instruments). The load is 1 mN / 20 s, a diamond cone is used as the needle, and the surface angle is 136 °.

There is no restriction | limiting in particular as pencil hardness of the said lipophilic resin layer, Although it can select suitably according to the objective, B-4H is preferable, HB-4H is more preferable, F-4H is especially preferable. When the pencil hardness is less than B (softer than B), the lipophilic resin layer is subjected to surface cleaning during normal use, such as handling and surface cleaning when manufacturing or molding the lipophilic laminate. Scratches easily. In addition, when molding the lipophilic laminate, any one of the fine protrusions and recesses on the surface of the lipophilic resin layer is deformed too much, resulting in a high oleic acid contact angle and a decrease in fingerprint resistance. Sometimes. When the pencil hardness exceeds 4H (harder than 4H), cracks may occur in the lipophilic resin layer or the lipophilic resin layer may peel off during molding. When the pencil hardness is within the particularly preferred range, the lipophilic laminate can be variously three-dimensionally produced without reducing fingerprint resistance and without causing defects such as scratches, cracks, and peeling. This is advantageous in that it can be easily formed into a shape.
In addition, after molding the lipophilic laminate, high temperature and high pressure are applied to the lipophilic resin layer in the injection molding process, so that the pencil hardness of the lipophilic resin layer may be higher than before the molding process.
The pencil hardness is measured according to JIS K 5600-5-4.

  There is no restriction | limiting in particular as average thickness of the said lipophilic resin layer, Although it can select suitably according to the objective, 1 micrometer-100 micrometers are preferable, 1 micrometer-50 micrometers are more preferable, and 1 micrometer-30 micrometers are especially preferable.

  The total of the average thickness of the lipophilic resin layer and the average thickness of the intermediate layer is not particularly limited and may be appropriately selected depending on the intended purpose. 0 μm to 13.0 μm is preferable.

<Other members>
Examples of the other members include a protective layer, an adhesive layer, and an adhesive layer.

-Protective layer-
The protective layer is not particularly limited as long as it is a layer that prevents the lipophilic resin layer from being damaged when the lipophilic laminate is formed or processed on the lipophilic resin layer. It can be appropriately selected depending on the purpose. The protective layer is peeled off when the lipophilic laminate is used.

-Adhesive layer, adhesive layer-
The pressure-sensitive adhesive layer and the adhesive layer are not particularly limited as long as they are layers formed on the resin base material and adhere the lipophilic laminate to a workpiece, an adherend, and the like. It can be appropriately selected depending on the case.

There is no restriction | limiting in particular as elongation rate of the said lipophilic laminated body, Although it can select suitably according to the objective, 10% or more is preferable, 10%-200% are more preferable, 40%-150% are especially preferable. preferable. If the elongation is less than 10%, molding may be difficult. When the elongation percentage is within the particularly preferable range, it is advantageous in that the moldability is excellent.
The said elongation rate can be calculated | required with the following method, for example.
The lipophilic laminate is formed into a strip shape having a length of 10.5 cm and a width of 2.5 cm to obtain a measurement sample. The tensile elongation of the obtained measurement sample is measured with a tensile tester (Autograph AG-5kNXplus, manufactured by Shimadzu Corporation) (measurement condition: tensile speed = 100 mm / min; distance between chucks = 8 cm). The measurement is performed while visually observing the measurement sample, and the elongation rate immediately before the crack is generated in the lipophilic laminate is determined. This is obtained from N = 5 measurement samples, and the average value thereof is defined as the elongation ratio of the lipophilic laminate. In addition, the value of the said elongation rate should just satisfy | fill when it measures at room temperature (25 degreeC) or the softening point of the said resin-made base materials.

  The lipophilic laminate preferably has a smaller difference in heat shrinkage between the X direction and the Y direction in the plane of the lipophilic laminate. The X direction and the Y direction of the lipophilic laminate correspond to, for example, the longitudinal direction and the width direction of the roll when the lipophilic laminate has a roll shape. The difference between the heat shrinkage rate in the X direction and the heat shrinkage rate in the Y direction in the lipophilic laminate is preferably within 5% at the heating temperature used in the heating step during molding. Outside this range, during the molding process, the lipophilic resin layer may be peeled or cracked, or the characters, patterns, images, etc. printed on the surface of the resin base material may be deformed or misaligned. This may cause the molding process to be difficult.

  The lipophilic laminate is particularly suitable for in-mold molding films, insert molding films, and overlay molding films.

  There is no restriction | limiting in particular as a manufacturing method of the said lipophilic laminated body, According to the objective, it can select suitably, For example, the following 1st method, the manufacturing method of the lipophilic laminated body of this invention mentioned later, etc. are mentioned. It is done. Among these, the manufacturing method of the lipophilic laminated body of this invention mentioned later is preferable.

[First method]
In the first method, a resin base material having either a fine convex portion or a concave portion on the surface is prepared, and the surface having either the fine convex portion or the concave portion of the resin base material is formed on the surface. This is a method of forming an intermediate layer and a lipophilic resin layer that follow either a fine convex portion or a concave portion.
Specifically, in the first method, for example, a melt extrusion method, a transfer method, or the like can be used. As the melt extrusion method, for example, immediately after the thermoplastic resin composition is discharged from a die into a film or the like, a resin base material that is a thermoplastic resin composition having a roll surface niped by two rolls. The method of transferring to is mentioned. As the transfer method, for example, the molding surface of the master is pressed by pressing the molding surface of the master having any one of the fine protrusions and recesses against the resin base material and heating it near or above its glass transition point. There is a thermal transfer method in which the shape is transferred to the surface of the resin base material.
And after apply | coating the said active energy ray curable resin composition for forming an intermediate | middle layer on the surface of the resin-made base materials which has either a fine convex part and a recessed part on the surface, the said active energy ray hardening The active energy ray is applied to the active energy ray-curable resin composition after irradiating the active energy ray to the active resin composition and further applying the active energy ray-curable resin composition for forming the lipophilic resin layer. Is cured by forming an intermediate layer and a lipophilic resin layer that follow the shape of either the fine convex portion or the concave portion. The irradiation amount of the active energy ray at the time of forming the intermediate layer is not the irradiation amount for completely curing the active energy ray curable resin composition for forming the intermediate layer, but the active energy ray curable resin. It may be an irradiation amount for semi-curing the composition. And you may harden the said intermediate | middle layer completely by irradiation of the active energy ray at the time of forming the said lipophilic resin layer.

(Lipophilic laminate production method)
The method for producing a lipophilic laminate of the present invention includes at least an uncured resin layer forming step and a lipophilic resin layer forming step, and further includes other steps as necessary.
The method for producing the lipophilic laminate is a method for producing the lipophilic laminate of the present invention.

<Uncured resin layer forming step>
The uncured resin layer forming step is not particularly limited as long as it is a step of forming an uncured resin layer by applying an active energy ray-curable resin composition on an intermediate layer, and is appropriately selected according to the purpose. be able to.

  Examples of the intermediate layer include the intermediate layer exemplified in the description of the lipophilic laminate of the present invention.

  The intermediate layer is formed on a resin base material. Examples of the method for forming the intermediate layer on the resin substrate include the coating methods exemplified in the description of the lipophilic laminate of the present invention.

  There is no restriction | limiting in particular as said resin-made base material, According to the objective, it can select suitably, For example, the said resin-made base material etc. which were illustrated in description of the said lipophilic laminated body of this invention are mentioned.

  The active energy ray-curable resin composition is not particularly limited and may be appropriately selected depending on the purpose. For example, the active energy ray-curable resin composition is exemplified in the description of the lipophilic resin layer of the lipophilic laminate of the present invention. An active energy ray-curable resin composition is exemplified.

  The uncured resin layer is formed by applying the active energy ray-curable resin composition on the intermediate layer and drying as necessary. The uncured resin layer may be a solid film or a film having fluidity due to a low molecular weight curable component contained in the active energy ray curable resin composition.

  There is no restriction | limiting in particular as said application | coating method, According to the objective, it can select suitably, For example, wire bar coating, blade coating, spin coating, reverse roll coating, die coating, spray coating, roll coating, gravure coating , Micro gravure coating, lip coating, air knife coating, curtain coating, comma coating method, dipping method and the like.

  The uncured resin layer is not cured because it is not irradiated with active energy rays.

<Lipophilic resin layer forming step>
In the lipophilic resin layer forming step, a transfer master having either a fine convex portion or a concave portion is brought into close contact with the uncured resin layer, and active energy rays are irradiated to the uncured resin layer to which the transfer master is in close contact. There is no particular limitation as long as it is a step of forming an oleophilic resin layer by curing the uncured resin layer and transferring either the fine convex portion or the concave portion, and it is appropriately selected according to the purpose. be able to.

-Transcription master-
The transfer master has either a fine convex part or a concave part.
There is no restriction | limiting in particular as a material of the said transfer original disc, a magnitude | size, and a structure, According to the objective, it can select suitably.
There is no particular limitation on the method for forming any of the fine convex portions and concave portions of the transfer master, and it can be selected as appropriate according to the purpose. However, the transfer using a photoresist having a predetermined pattern shape as a protective film is possible. It is preferably formed by etching the surface of the master. Further, it is preferable to form the transfer master by irradiating the surface of the transfer master with a laser.

-Active energy ray-
The active energy ray is not particularly limited as long as it is an active energy ray that cures the uncured resin layer, and can be appropriately selected according to the purpose. For example, description of the lipophilic laminate of the present invention And the active energy rays exemplified in 1.

  Here, the specific example of the said lipophilic resin layer formation process is demonstrated using figures.

[First Embodiment]
In the first embodiment, the oleophilic resin is formed by using a transfer master in which either a fine convex portion or a concave portion is formed by etching the surface of the transfer master using a photoresist having a predetermined pattern shape as a protective film. It is an example of a layer formation process.

  First, the transfer master and its manufacturing method will be described.

[Configuration of the transfer master]
FIG. 3A is a perspective view illustrating an example of a configuration of a roll master that is a transfer master. 3B is an enlarged plan view showing a part of the roll master shown in FIG. 3A. 3C is a cross-sectional view of the track T in FIG. 3B. The roll master 231 is a transfer master for producing the lipophilic laminate having the above-described configuration, more specifically, a master for forming a plurality of convex portions or concave portions on the surface of the lipophilic resin layer. . The roll master 231 has, for example, a columnar or cylindrical shape, and the columnar surface or cylindrical surface is a molding surface for molding a plurality of convex portions or concave portions on the surface of the lipophilic resin layer. For example, a plurality of structures 232 are two-dimensionally arranged on the molding surface. In FIG. 3C, the structure 232 has a concave shape with respect to the molding surface. As a material of the roll master 231, for example, glass can be used, but it is not particularly limited to this material.

  The plurality of structures 232 arranged on the molding surface of the roll master 231 and the plurality of projections or depressions arranged on the surface of the lipophilic resin layer have an inverted concavo-convex relationship. That is, the arrangement, size, shape, arrangement pitch, height or depth, aspect ratio, and the like of the structures 232 of the roll master 231 are the same as the convex portions or concave portions of the lipophilic resin layer.

[Roll master exposure equipment]
FIG. 4 is a schematic diagram showing an example of the configuration of a roll master exposure apparatus for producing a roll master. This roll master exposure apparatus is configured based on an optical disk recording apparatus.

  The laser light source 241 is a light source for exposing the resist deposited on the surface of the roll master 231 as a recording medium, and oscillates a recording laser beam 234 having a wavelength λ = 266 nm, for example. The laser light 234 emitted from the laser light source 241 travels straight as a parallel beam and enters an electro-optic element (EOM: Electro Optical Modulator) 242. The laser beam 234 that has passed through the electro-optical element 242 is reflected by the mirror 243 and guided to the modulation optical system 245.

  The mirror 243 is composed of a polarization beam splitter and has a function of reflecting one polarization component and transmitting the other polarization component. The polarization component transmitted through the mirror 243 is received by the photodiode 244, and the electro-optic element 242 is controlled based on the received light signal to perform phase modulation of the laser beam 234.

In the modulation optical system 245, the laser beam 234 is collected by an acousto-optic modulator (AOM) 247 made of glass (SiO ₂ ) or the like by a condenser lens 246. The laser beam 234 is intensity-modulated by the acousto-optic element 247 and diverges, and then converted into a parallel beam by the lens 248. The laser beam 234 emitted from the modulation optical system 245 is reflected by the mirror 251 and guided horizontally and parallel on the moving optical table 252.

  The moving optical table 252 includes a beam expander 253 and an objective lens 254. The laser beam 234 guided to the moving optical table 252 is shaped into a desired beam shape by the beam expander 253 and then irradiated to the resist layer on the roll master 231 through the objective lens 254. The roll master 231 is placed on a turntable 256 connected to a spindle motor 255. Then, while rotating the roll master 231 and moving the laser beam 234 in the height direction of the roll master 231, the laser beam 234 is intermittently applied to the resist layer formed on the peripheral side surface of the roll master 231. Then, a resist layer exposure step is performed. The formed latent image has a substantially elliptical shape having a major axis in the circumferential direction. The laser beam 234 is moved by moving the moving optical table 252 in the arrow R direction.

  The exposure apparatus includes a control mechanism 257 for forming a latent image corresponding to the two-dimensional pattern of the plurality of convex portions or concave portions described above on the resist layer. The control mechanism 257 includes a formatter 249 and a driver 250. The formatter 249 includes a polarity reversal unit, and this polarity reversal unit controls the irradiation timing of the laser beam 234 on the resist layer. The driver 250 receives the output from the polarity inversion unit and controls the acoustooptic device 247.

  In this roll master exposure apparatus, the polarity inversion formatter signal and the rotation controller are synchronized for each track so that the two-dimensional pattern is spatially linked, and the intensity is modulated by the acousto-optic element 247. A two-dimensional pattern such as a hexagonal lattice pattern can be recorded by patterning with a constant angular velocity (CAV) and an appropriate rotational speed, an appropriate modulation frequency, and an appropriate feed pitch.

[Resist film formation process]
First, as shown in the cross-sectional view of FIG. 5A, a columnar or cylindrical roll master 231 is prepared. The roll master 231 is, for example, a glass master. Next, as shown in the cross-sectional view of FIG. 5B, a resist layer (for example, a photoresist) 233 is formed on the surface of the roll master 231. Examples of the material for the resist layer 233 include organic resists and inorganic resists. Examples of the organic resist include novolak resist and chemically amplified resist. Examples of the inorganic resist include metal compounds.

[Exposure process]
Next, as shown in the cross-sectional view of FIG. 5C, the resist layer 233 formed on the surface of the roll master 231 is irradiated with laser light (exposure beam) 234. Specifically, the roll master 231 is placed on the turntable 256 of the roll master exposure apparatus shown in FIG. 4, the roll master 231 is rotated, and the resist layer 233 is irradiated with a laser beam (exposure beam) 234. . At this time, the laser beam 234 is intermittently irradiated while moving the laser beam 234 in the height direction of the roll master 231 (a direction parallel to the central axis of the columnar or cylindrical roll master 231). Layer 233 is exposed over the entire surface. Thereby, a latent image 235 corresponding to the locus of the laser beam 234 is formed over the entire surface of the resist layer 233.

  For example, the latent image 235 is arranged to form a plurality of rows of tracks T on the surface of the roll master, and is formed with a regular periodic pattern of a predetermined unit cell Uc. The latent image 235 has, for example, a circular shape or an elliptical shape. When the latent image 235 has an elliptical shape, the elliptical shape preferably has a major axis direction in the extending direction of the track T.

[Development process]
Next, for example, while rotating the roll master 231, a developing solution is dropped on the resist layer 233 to develop the resist layer 233. As a result, a plurality of openings are formed in the resist layer 233 as shown in the cross-sectional view of FIG. 5D. When the resist layer 233 is formed of a positive type resist, the exposed portion exposed with the laser beam 234 has a higher dissolution rate in the developer than the non-exposed portion, and as shown in the sectional view of FIG. 5D. A pattern corresponding to the latent image (exposed portion) 235 is formed on the resist layer 233. The pattern of the opening is, for example, a regular periodic pattern of a predetermined unit cell Uc.

[Etching process]
Next, the surface of the roll master 231 is etched using the pattern (resist pattern) of the resist layer 233 formed on the roll master 231 as a mask. Thereby, as shown to sectional drawing of FIG. 5E, the structure (recessed part) 232 which has a cone shape can be obtained. The cone shape is preferably, for example, an elliptical cone shape or an elliptical truncated cone shape having a major axis direction in the extending direction of the track T. As the etching, for example, dry etching or wet etching can be used. At this time, by alternately performing the etching process and the ashing process, for example, a pattern of the cone-shaped structure 232 can be formed. Thus, the intended roll master 231 is obtained.

[Transfer processing]
A resin base material 211 having an uncured resin layer 236 and an intermediate layer 213 as shown in the cross-sectional view of FIG. 6A is prepared.
Next, as shown in the cross-sectional view of FIG. 6B, the roll master 231 and the uncured resin layer 236 formed on the intermediate layer 213 are brought into close contact, and the uncured resin layer 236 is irradiated with the active energy rays 237 to be irradiated. The cured resin layer 236 is cured to transfer any of the fine convex portions and concave portions, thereby obtaining the lipophilic resin layer 212 in which any one of the fine convex portions and concave portions 212a is formed.
Finally, the obtained lipophilic resin layer 212 is peeled from the roll master 231 to obtain a lipophilic laminate (FIG. 6C).
When the resin base material 211 is made of a material that does not transmit active energy rays such as ultraviolet rays, the roll master 231 is made of a material that can transmit active energy rays (for example, quartz). You may make it irradiate an active energy ray with respect to the uncured resin layer 236 from the inside of H.231. The transfer master is not limited to the roll master 231 described above, and a flat master may be used. However, from the viewpoint of improving mass productivity, it is preferable to use the roll master 231 described above as the transfer master.

[Second Embodiment]
In the second embodiment, the lipophilic resin layer formation is performed using a transfer master in which either a fine convex portion or a concave portion is formed by irradiating the surface of the transfer master with a laser to laser-process the transfer master. It is an example of a process.

  First, the transfer master and its manufacturing method will be described.

[Configuration of the transfer master]
FIG. 7A is a plan view showing an example of the configuration of a plate-shaped master. FIG. 7B is a cross-sectional view taken along the line aa shown in FIG. 7A. FIG. 7C is an enlarged cross-sectional view of a part of FIG. 7B. The plate-shaped master 331 is a master for producing the lipophilic laminate having the above-described configuration, more specifically, a master for molding a plurality of convex portions or concave portions on the surface of the lipophilic resin layer. is there. The plate-shaped master 331 has, for example, a surface provided with a fine concavo-convex structure, and the surface is a molding surface for molding a plurality of convex portions or concave portions on the surface of the lipophilic resin layer. For example, a plurality of structures 332 are provided on the molding surface. The structure 332 illustrated in FIG. 7C has a concave shape with respect to the molding surface. As a material of the plate-shaped master 331, for example, a metal material can be used. As the metal material, for example, Ni, NiP, Cr, Cu, Al, Fe, and alloys thereof can be used. The alloy is preferably stainless steel (SUS). Examples of the stainless steel (SUS) include, but are not limited to, SUS304, SUS420J2, and the like.

  The plurality of structures 332 provided on the molding surface of the plate-shaped master 331 and the plurality of protrusions or recesses provided on the surface of the lipophilic resin layer have an inverted uneven relationship. That is, the arrangement, size, shape, arrangement pitch, height, depth, and the like of the structures 332 of the plate-like master 331 are the same as those of the protrusions or recesses of the lipophilic resin layer.

[Configuration of laser processing equipment]
FIG. 8 is a schematic diagram showing an example of the configuration of a laser processing apparatus for producing a plate-shaped master. The laser body 340 is, for example, IFRIT (trade name) manufactured by Cyber Laser Corporation. The wavelength of the laser used for laser processing is, for example, 800 nm. However, the wavelength of the laser used for laser processing may be 400 nm or 266 nm. The repetition frequency is preferably larger in consideration of the processing time and the narrow pitch of the concave portions or convex portions to be formed, and is preferably 1,000 Hz or more. The laser pulse width is preferably shorter, and is preferably about 200 femtoseconds ( ^10-15 seconds) to 1 picosecond ( ^10-12 seconds).

  The laser body 340 emits laser light linearly polarized in the vertical direction. Therefore, in this apparatus, linear polarization or circular polarization in a desired direction is obtained by rotating the polarization direction using a wave plate 341 (for example, a λ / 2 wave plate). Further, in this apparatus, a part of the laser light is extracted using an aperture 342 having a square opening. This is because the intensity distribution of the laser beam is a Gaussian distribution, so that only the center vicinity is used to obtain a laser beam having a uniform in-plane intensity distribution. Further, in this apparatus, the laser beam is focused using two orthogonal cylindrical lenses 343 so that a desired beam size is obtained. When processing the plate-shaped master 331, the linear stage 344 is moved at a constant speed.

  The beam spot of the laser irradiated on the plate-shaped master 331 is preferably rectangular. The beam spot can be shaped by using, for example, an aperture or a cylindrical lens. Further, the intensity distribution of the beam spot is preferably as uniform as possible. This is because it is preferable to make the in-plane distribution such as the depth of the unevenness formed in the mold as uniform as possible. In general, since the size of the beam spot is smaller than the area to be processed, it is necessary to give an uneven shape to all the areas to be processed by scanning the beam.

The master (mold) used to form the surface of the lipophilic resin layer is, for example, a substrate such as a metal such as SUS, NiP, Cu, Al, or Fe, and a pulse width of 1 picosecond ( ^10-12 seconds) or less. It is formed by drawing a pattern using an ultrashort pulse laser, so-called femtosecond laser. The polarization of the laser light may be linearly polarized light, circularly polarized light, or elliptically polarized light. At this time, a pattern having desired irregularities can be formed by appropriately setting the laser wavelength, repetition frequency, pulse width, beam spot shape, polarization, laser intensity applied to the sample, laser scanning speed, and the like.

The parameters that can be changed to obtain the desired shape include the following. The fluence is an energy density (J / cm ² ) per pulse, and is obtained by the following equation.
F = P / (fREPT × S)
S = Lx × Ly
F: fluence P: laser power fREPT: laser repetition frequency S: area at the laser irradiation position Lx × Ly: beam size Note that the number of pulses N is the number of pulses irradiated at one place, and It is calculated by the formula.
N = fREPT × Ly / v
Ly: Beam size in laser scanning direction v: Laser scanning speed

  Further, the material of the plate-shaped master 331 may be changed in order to obtain a desired shape. The shape of laser processing varies depending on the material of the plate-shaped master 331. In addition to using metals such as SUS, NiP, Cu, Al, and Fe, the surface of the master may be coated with a semiconductor material such as DLC (diamond-like carbon). Examples of the method for coating the surface of the master with the semiconductor material include plasma CVD and sputtering. As the semiconductor material to be coated, in addition to DLC, for example, DLC mixed with fluorine (F), titanium nitride, chromium nitride, or the like can be used. The average thickness of the coating obtained by coating may be about 1 μm, for example.

[Laser processing process]
First, as shown in FIG. 9A, a plate-shaped master 331 is prepared. A surface 331A that is a surface to be processed of the plate-like master 331 is in a mirror state, for example. The surface 331A may not be in a mirror state. For example, the surface 331A may have irregularities finer than the transfer pattern, or may be equivalent to the transfer pattern. Rougher irregularities may be formed.

Next, the surface 331A of the plate-shaped master 331 is laser-processed as follows using the laser processing apparatus shown in FIG. First, a pattern is drawn on the surface 331A of the plate-shaped master 331 using an ultrashort pulse laser having a pulse width of 1 picosecond (10 ⁻¹² seconds) or less, so-called femtosecond laser. For example, as shown in FIG. 9B, the surface 331A of the plate-shaped master 331 is irradiated with femtosecond laser light Lf, and the irradiation spot is scanned with respect to the surface 331A.

  At this time, the laser wavelength, the repetition frequency, the pulse width, the beam spot shape, the polarization, the intensity of the laser applied to the surface 331A, the laser scanning speed, etc. are appropriately set, as shown in FIG. A plurality of structures 332 having the structure is formed.

[Transfer processing]
A resin base material 311 having an uncured resin layer 333 and an intermediate layer 313 as shown in the cross-sectional view of FIG. 10A is prepared.
Next, as shown in the cross-sectional view of FIG. 10B, the plate-shaped master 331 and the uncured resin layer 333 formed on the intermediate layer 313 are brought into close contact, and the active energy ray 334 is irradiated to the uncured resin layer 333. Then, the uncured resin layer 333 is cured, and any one of the fine convex portions and concave portions of the plate-shaped master 331 is transferred to obtain the lipophilic resin layer 312 in which any one of the fine convex portions and concave portions is formed.
Finally, the obtained lipophilic resin layer 312 is peeled from the plate-shaped master 331 to obtain a lipophilic laminate (FIG. 10C).
When the resin base material 311 is made of a material that does not transmit active energy rays such as ultraviolet rays, the plate-shaped master 331 is made of a material that can transmit active energy rays (for example, quartz), You may make it irradiate an active energy ray with respect to the uncured resin layer 333 from the back surface (surface on the opposite side to a shaping | molding surface) of the plate-shaped master 331. FIG.

[Third Embodiment]
3rd Embodiment is an example of the said lipophilic resin layer formation process performed using the transfer original disc formed by forming a porous alumina layer in an aluminum base material.

  First, the transfer master and its manufacturing method will be described.

  Examples of the aluminum base material processed into the transfer master include, for example, an aluminum film formed on a bulk aluminum, a glass base material, or a plastic base material through an underlayer or the like.

  There is no restriction | limiting in particular as a shape of the said aluminum base material, According to the objective, it can select suitably, For example, plate shape, cylindrical shape, column shape, etc. are mentioned.

The porous alumina layer is formed by, for example, anodic oxidation or wet etching.
The porous alumina layer has fine concave portions. The arrangement of the fine recesses may or may not have periodicity.
As a method for forming the porous alumina layer, specifically, for example, as disclosed in Japanese Patent Application Laid-Open No. 2005-156695, an aluminum substrate is immersed in an acidic electrolytic solution or an alkaline electrolytic solution, and this is performed. Examples include a method of forming a porous alumina layer having a plurality of fine recesses by applying a voltage as the anode. This anodizing treatment and a hole diameter enlargement treatment by etching treatment may be appropriately combined.

  Examples of the lipophilic resin layer forming step performed using the manufactured transfer master include the same methods as in the first embodiment and the second embodiment.

[Fourth Embodiment]
As a fourth embodiment, the lipophilicity is carried out using a transfer master having a macro uneven structure formed on the surface of an aluminum substrate and subsequently forming a fine recess (micro structure) in the macro uneven structure. It is an example of a resin layer formation process.
Examples of the method for producing the transfer master include a method described in JP-T-2001-517319.
In addition to fingerprint resistance, the anti-glare layer is formed on the lipophilic laminate obtained by using the transfer master by forming the macro uneven structure and the fine recesses (micro structure) on the transfer master. Functions can be added. The macro uneven structure for imparting the antiglare function can be imparted to the surface of the aluminum substrate by, for example, blasting (sand blasting or bead blasting), etching using acid, or a combination thereof. The fine recesses (microstructure) can be formed by anodic oxidation, wet etching, or the like.

Examples of the lipophilic resin layer forming step performed using the manufactured transfer master include the same methods as in the first embodiment and the second embodiment.
An example of the lipophilic laminate obtained using this transfer master is shown in FIG. The lipophilic laminate shown in FIG. 11 has a resin base material 401, and an intermediate layer 403 and a lipophilic resin layer 402 on the resin base material 401. On the surface of the lipophilic resin layer 402, a macro uneven structure and a fine recess formed in the macro uneven structure are formed.

(Goods)
The article of the present invention has the lipophilic laminate of the present invention on the surface, and further includes other members as necessary.
The article is not particularly limited and can be appropriately selected according to the purpose. For example, a touch panel, a smartphone, a tablet PC, a cosmetic container, accessories, a glass window, a refrigerated / frozen showcase, a car window, etc. Examples include window materials, mirrors in bathrooms, mirrors such as car side mirrors, pianos, and building materials.
In addition, the article includes glasses, goggles, a helmet, a lens, a micro lens array, a headlight cover of an automobile, a front panel, a side panel, a rear panel, a door trim, an instrument panel, a center cluster / center console panel, a shift knob, a shift knob, It may be a steering emblem. These are preferably formed by in-mold molding, insert molding, or overlay molding.

  The lipophilic laminate may be formed on a part of the surface of the article, or may be formed on the entire surface.

  There is no restriction | limiting in particular as a manufacturing method of the said article | item, Although it can select suitably according to the objective, The manufacturing method of the article | item of this invention mentioned later is preferable.

(Product manufacturing method)
The method for producing an article according to the present invention includes at least a heating step, a lipophilic laminate molding step, and an injection molding step, and further includes other steps as necessary.
The manufacturing method of the article is the manufacturing method of the article of the present invention.

<Heating process>
The heating step is not particularly limited as long as it is a step of heating the lipophilic laminate, and can be appropriately selected according to the purpose.
The lipophilic laminate is the lipophilic laminate of the present invention.

There is no restriction | limiting in particular as said heating, Although it can select suitably according to the objective, It is preferable that it is infrared heating.
There is no restriction | limiting in particular as the temperature of the said heating, Although it can select suitably according to the objective, It is preferable that it is the glass transition temperature vicinity of the said resin-made base materials, or more than a glass transition temperature.
There is no restriction | limiting in particular as time of the said heating, According to the objective, it can select suitably.

<Lipophilic laminate molding process>
The lipophilic laminate molding step is not particularly limited as long as it is a step of molding the heated lipophilic laminate into a desired shape, and can be appropriately selected according to the purpose. The process etc. which make it closely_contact | adhere to a metal mold | die and shape | mold into a desired shape with an air pressure are mentioned.

<Injection molding process>
The injection molding process is not particularly limited as long as it is a process for injecting a molding material onto the resin base material side of the lipophilic laminate molded into a desired shape and molding the molding material. It can be appropriately selected depending on the case.

  Examples of the molding material include a resin. Examples of the resin include olefin resins, styrene resins, ABS resins (acrylonitrile-butadiene-styrene copolymers), AS resins (acrylonitrile-styrene copolymers), acrylic resins, urethane resins, unsaturated polyesters. Resin, epoxy resin, polyphenylene oxide / polystyrene resin, polycarbonate, polycarbonate modified polyphenylene ether, polyethylene terephthalate, polysulfone, polyphenylene sulfide, polyphenylene oxide, polyether imide, polyimide, liquid crystal polyester, polyallyl heat resistant resin, various composite resins, various modified resins Resin etc. are mentioned.

  The injection method is not particularly limited and can be appropriately selected depending on the purpose. For example, the molten mold is formed on the resin base material side of the lipophilic laminate adhered to a predetermined mold. The method of pouring material is mentioned.

  The article manufacturing method is preferably performed using an in-mold molding apparatus, an insert molding apparatus, and an overlay molding apparatus.

Here, an example of a method for manufacturing an article of the present invention will be described with reference to the drawings. This manufacturing method is a manufacturing method using an in-mold molding apparatus.
First, the lipophilic laminate 500 is heated. Heating is preferably infrared heating.
Subsequently, as shown in FIG. 12A, the heated lipophilic laminate 500 is disposed at a predetermined position between the first mold 501 and the second mold 502. At this time, the resin base material of the lipophilic laminate 500 is arranged so that the first mold 501 faces and the lipophilic resin layer faces the second mold 502. In FIG. 12A, the first mold 501 is a fixed mold, and the second mold 502 is a movable mold.

After the lipophilic laminate 500 is disposed between the first mold 501 and the second mold 502, the first mold 501 and the second mold 502 are clamped. Subsequently, the lipophilic laminate 500 is sucked through the suction holes 504 opened in the cavity surface of the second mold 502, and the lipophilic laminate 500 is mounted on the cavity surface of the second mold 502. By doing so, the cavity surface is shaped with the lipophilic laminate 500. At this time, the outer periphery of the lipophilic laminate 500 may be fixed and positioned by a film pressing mechanism (not shown). Thereafter, unnecessary portions of the lipophilic laminate 500 are trimmed (FIG. 12B).
If the second mold 502 does not have the suction hole 504 and the first mold 501 has a pressure hole (not shown), the pressure hole of the first mold 501 can be connected to the lipophilic laminate 500. By sending the compressed air, the lipophilic laminate 500 is attached to the cavity surface of the second mold 502.

  Subsequently, the molten molding material 506 is injected from the gate 505 of the first mold 501 toward the resin base material of the lipophilic laminate 500, and the first mold 501 and the second mold 502 are clamped. Then, it is injected into the cavity formed (FIG. 12C). Thereby, the molten molding material 506 is filled in the cavity (FIG. 12D). Further, after the filling of the molten molding material 506 is completed, the molten molding material 506 is cooled to a predetermined temperature and solidified.

Thereafter, the second mold 502 is moved to open the first mold 501 and the second mold 502 (FIG. 12E). By doing so, an article 507 in which the lipophilic laminate 500 is formed on the surface of the molding material 506 and in-mold molded into a desired shape is obtained.
Finally, the protruding pin 508 is pushed out from the first mold 501 and the obtained article 507 is taken out.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

<Average distance of convex part, average distance of concave part, average height of convex part, average depth of concave part, average aspect ratio>
In the following examples, the average distance of the convex portions, the average distance of the concave portions, the average height of the convex portions, the average depth of the concave portions, and the average aspect ratio were determined as follows.
First, the surface of the lipophilic resin layer having a convex portion or a concave portion is observed with an atomic force microscope (AFM), and the pitch of the convex portion or the concave portion, the height of the convex portion or the concave portion from the cross-sectional profile of the AFM. Sought the depth of. This is repeated at 10 locations randomly selected from the surface of the lipophilic resin layer, and the pitches P1, P2,..., P10 and the heights or depths H1, H2,. Asked.
Here, the pitch of the convex portions is a distance between the vertices of the convex portions. The pitch of the recesses is the distance between the deepest portions of the recesses. The height of the convex portion is the height of the convex portion based on the lowest point of the valley between the convex portions. The depth of the recess is the depth of the recess based on the highest point of the peak between the recesses.
Next, these pitches P1, P2,..., P10 and the heights or depths H1, H2,. (Pm) and the average height of the convex portions or the average depth (Hm) of the concave portions were determined.
An average aspect ratio (Hm / Pm) was determined from the Pm and the Hm.

<Refractive index>
The refractive index was determined by the following method.
The thickness of the sample intermediate layer and the lipophilic resin layer was determined by observing the cross section of the composition with SEM (manufactured by JEOL, JSM-6510A).
Next, the surface reflection spectrum of the sample was measured by an F20 film thickness measurement system manufactured by Filmetrics.
Finally, the refractive index was calculated from the film thickness and reflection spectrum measured by SEM using FILMeasurement thin film measurement software (Ver. 2.4.3) manufactured by Filmetrics, in which the following analysis method was programmed.

The analysis method is as follows.
Consider the reflected light when light is irradiated vertically to a sample in which a thin film is formed on a substrate. In this case, light is reflected on both the upper surface and the lower surface of the thin film, and the amount of reflected light is the sum of these two reflected lights. Reflected light from these two interfaces is strengthened or weakened depending on the optical path difference. The mutual optical path difference is determined by the film thickness d and the refractive index n of the thin film. When the optical path difference is an integer multiple of the wavelength, the two reflected lights are added in phase and intensified. When light enters at a right angle to the transparent film, this phenomenon occurs when 2nd = mλ (m is an integer). On the other hand, when the wavelength is shifted by ½ wavelength from the in-phase state, that is, when 2nd = (m + 1/2) λ, the two reflected lights are subtracted in the direction of canceling each other. From these, the total reflection spectrum can be expressed by the following one equation.
The refractive index n is obtained by fitting the reflection spectrum using this equation and the actually measured film thickness. The above analysis method is a principle and may be slightly different from the method actually used. Here, R is a reflectance, and A and B are constants.

<Oleic acid contact angle>
The oleic acid contact angle was measured under the following conditions using PCA-1 (manufactured by Kyowa Interface Chemical Co., Ltd.).
Oleic acid was placed in a plastic syringe, a Teflon-coated needle was attached to the tip, and the oleic acid was dropped onto the evaluation surface.
Drip amount of oleic acid: 1 μL
Measurement temperature: 25 ° C
The contact angle after 100 seconds after dropping oleic acid was measured at any 10 locations on the surface of the lipophilic resin layer, and the average value was defined as the oleic acid contact angle.

<Fingerprint resistance>
Double-sided pressure-sensitive adhesive sheet (manufactured by Nitto Denko Corporation, product) on a black acrylic plate (Mitsubishi Rayon Co., Ltd., trade name: Acrylite) with the evaluation surface (lipophilic resin layer surface) facing up. Name: LUCIACS CS9621T). Next, a fingerprint was attached to the evaluation surface with an index finger, and the invisibility of the attached fingerprint and the tissue wiping property were evaluated according to the following methods.

<< Insufficient adhesion of attached fingerprint (fingerprint pattern visible) >>
A fingerprint was attached to the surface of the oleophilic resin layer with an index finger, a fluorescent lamp was projected after 1 minute, the surface was visually observed, and the following criteria were evaluated.
〔Evaluation criteria〕
A: The fingerprint spread wet and it was difficult to see the fingerprint.
○: The fingerprint spread wet, but the area where the fingerprint was attached was visible.
X: Insufficient wetting and spreading of the fingerprint, and the fingerprint was clearly visible to the pattern.

<< Tissue wipeability (fingerprint wipeability) >>
Fingerprints are attached to the surface of the oleophilic resin layer with the index finger 20 times, and after wiping the tissue 10 times with a tissue (Daiou Paper Co., Ltd., Erière) in a circle, the fluorescent light is reflected and the surface is visually observed. And evaluated according to the following criteria.
〔Evaluation criteria〕
A: Fingerprint stains were gone.
○: Fingerprint stains remained slightly.
X: Fingerprint stains remained clearly.

<Adhesion>
The adhesion of the oleophilic resin layer was evaluated according to JIS K 5400 by a grid pattern (1 mm interval × 100 mass) cellophane tape (manufactured by Nichiban Co., Ltd., CT24) peel test.

<Interference fringes>
Black tape (VT-50, manufactured by Nichiban Co., Ltd.) is pasted on the back (base material side) of the lipophilic laminate, and a fluorescent lamp is projected at an angle of 45 °, and 10 arbitrary points are visually observed. The evaluation was based on the following criteria.
〔Evaluation criteria〕
A: Zero places where interference fringes can be seen.
○: Three or less places where interference fringes can be seen.
X: Interference fringes are visible at four or more locations.

(Example 1)
<Preparation of transfer master (glass roll master) having either fine convex part or concave part>
First, a glass roll master having an outer diameter of 126 mm was prepared, and a resist layer was formed on the surface of the glass roll master as follows. That is, the photoresist was diluted to 1/10 by weight with a thinner, and this diluted resist was applied to the average thickness of about 70 nm on the cylindrical surface of the glass roll master by dipping, thereby forming a resist layer. Next, the glass roll master is transported to the roll master exposure apparatus shown in FIG. 4, and the resist layer is exposed to form a hexagonal lattice pattern between three adjacent tracks while being continuous in one spiral. The latent image was patterned on the resist layer. Specifically, a hexagonal lattice-shaped exposure pattern was formed by irradiating a region where a hexagonal lattice-shaped exposure pattern was to be formed with 0.50 mW / m of laser light.

  Next, the resist layer on the glass roll master was subjected to development treatment, and the exposed resist layer was dissolved and developed. Specifically, an undeveloped glass roll master is placed on a turntable of a developing machine (not shown), and a developer is dropped on the surface of the glass roll master while rotating the entire turntable to develop the resist layer on the surface. did. Thereby, a resist glass master having a resist layer opened in a hexagonal lattice pattern was obtained.

Next, plasma etching was performed in a CHF ₃ gas atmosphere using a roll etching apparatus. As a result, only the hexagonal lattice pattern exposed from the resist layer is etched on the surface of the glass roll master, and the resist layer is used as a mask for the other regions and etching is not performed. Formed on the master. At this time, the etching amount (depth) was adjusted by the etching time. Finally, the resist layer was completely removed by O ₂ ashing to obtain a glass roll master having a concave hexagonal lattice pattern.

<Production of lipophilic laminate>
Next, an oleophilic laminate was produced by UV imprinting using the roll master obtained as described above. Specifically, it was performed as follows.
As a resin base material, DF02U (PMMA / PC laminate) (average thickness 180 μm) manufactured by Mitsubishi Gas Chemical Co., Ltd. was used.
The UV curable resin composition for intermediate layer having the following composition was applied on the PMMA surface of the resin base material so that the average thickness after drying and curing was 0.1 μm.

-UV curable resin composition for intermediate layer-
-A-9300-1CL (isocyanuric acid group-containing triacrylate) 15 parts by mass (manufactured by Shin-Nakamura Chemical Co., Ltd.)
・ 8BR-500 (made by Taisei Fine Chemical Co., Ltd.) 15 parts by mass (in terms of solid content)
-Butyl acetate (solvent) 68.8 parts by mass-KP323 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0.9 parts by mass-Irgacure 907 (manufactured by BASF) 0.3 Parts by mass

After drying, the uncured intermediate layer was irradiated with ultraviolet rays at a dose of 500 mJ / cm ² using a mercury lamp to obtain an ultraviolet-cured resin substrate with an intermediate layer.

An ultraviolet curable resin composition for a lipophilic resin layer having the following composition was applied onto an intermediate layer of a resin-made base material with an intermediate layer so that the average thickness of the resulting lipophilic resin layer was 2.5 μm. The resin base material with the intermediate layer coated with the ultraviolet curable resin composition for the oleophilic resin layer and the roll master obtained as described above are brought into close contact, and the resin base material side is used by using a metal halide lamp. Were irradiated with ultraviolet rays at an irradiation amount of 1,000 mJ / cm ² to cure the lipophilic resin layer. Thereafter, the lipophilic resin layer and the roll master were peeled off.

-UV curable resin composition for lipophilic resin layer-
-CN985B88 95 parts by mass (bifunctional aliphatic urethane acrylate, manufactured by Sartomer)
・ Lucirin TPO (manufactured by BASF) 5 parts by mass

  As described above, an oleophilic laminate having fine convex portions on the surface of the oleophilic resin layer was obtained. FIG. 13A shows an AFM image of the surface of the lipophilic resin layer of the obtained lipophilic laminate. A cross-sectional view taken along line aa in FIG. 13A is shown in FIG. 13B. FIG. 13C shows a three-dimensional AFM image. FIG. 13D shows an SEM image.

  About the obtained lipophilic laminated body, by the above-mentioned method, the average distance (or average distance of a recessed part) (Pm), the average height (or average depth of a recessed part) (Hm), average aspect of a convex part The ratio (Hm / Pm), oleic acid contact angle, fingerprint pattern appearance, fingerprint wiping property, adhesion, and interference fringes were evaluated. The results are shown in Table 2.

(Example 2)
In Example 1, a lipophilic laminate was produced in the same manner as in Example 1 except that the average thickness of the intermediate layer was changed to 0.7 μm.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 3)
In Example 1, a lipophilic laminate was produced in the same manner as in Example 1 except that the average thickness of the intermediate layer was changed to 2.0 μm.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

Example 4
A lipophilic laminate was produced in the same manner as in Example 1 except that the average thickness of the intermediate layer was changed to 4.0 μm in Example 1.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 5)
In Example 1, a lipophilic laminate was produced in the same manner as in Example 1 except that the average thickness of the intermediate layer was changed to 6.0 μm.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 6)
In Example 1, a lipophilic laminate was produced in the same manner as in Example 1 except that the average thickness of the intermediate layer was changed to 10.0 μm.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 7)
A lipophilic laminate was produced in the same manner as in Example 1, except that the thickness of the lipophilic resin layer was changed to 4.0 μm.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 8)
<Preparation of transfer master (plate-like master) having either fine convex part or concave part>
As the laser processing apparatus, the apparatus shown in FIG. 8 was used. As the laser body 340, IFRIT (trade name) manufactured by Cyber Laser Co., Ltd. was used. The laser wavelength was 800 nm, the repetition frequency was 1,000 Hz, and the pulse width was 220 fs.
First, a master was prepared by coating DLC (diamond-like carbon) on the surface of a plate-like substrate (SUS) by a sputtering method. Next, fine concave portions were formed on the surface of the DLC film of the master using the laser processing apparatus. At this time, laser processing was performed under the laser processing conditions shown in Table 1. Thus, a plate-shaped master for shape transfer was obtained. Note that the size of the master was a rectangular shape of 2 cm × 2 cm.

<Production of lipophilic laminate>
Next, an oleophilic laminate was produced by UV imprinting using the plate-shaped master obtained as described above. Specifically, it was performed as follows.
In the production of the lipophilic laminate of Example 4, a lipophilic laminate was produced in the same manner as in Example 4 except that the roll master was replaced with the plate-like master obtained as described above.
FIG. 14A shows an AFM image of the surface of the lipophilic resin layer of the obtained lipophilic laminate. A cross-sectional view taken along line aa in FIG. 14A is shown in FIG. 14B. FIG. 14C shows a three-dimensional AFM image.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Examples 9 to 11)
In Example 8, a lipophilic laminate was produced in the same manner as in Example 8, except that the conditions for producing the plate-shaped master were changed to the conditions shown in Table 1.
FIG. 15A shows an AFM image of the surface of the lipophilic resin layer of the obtained lipophilic laminate of Example 9. A cross-sectional view taken along the line aa in FIG. 15A is shown in FIG. 15B. FIG. 15C shows a three-dimensional AFM image.
The AFM image of the surface of the lipophilic resin layer of the obtained lipophilic laminate of Example 10 is shown in FIG. 16A. A cross-sectional view taken along the line aa in FIG. 16A is shown in FIG. 16B. FIG. 16C shows a three-dimensional AFM image.
The AFM image of the surface of the lipophilic resin layer of the obtained lipophilic laminate of Example 11 is shown in FIG. 17A. A cross-sectional view taken along line aa in FIG. 17A is shown in FIG. 17B. FIG. 17C shows a three-dimensional AFM image.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 12)
In Example 3, a lipophilic laminate was produced in the same manner as in Example 3 except that the ultraviolet curable resin composition for the lipophilic resin layer was changed to the composition shown below.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

-UV curable resin composition for lipophilic resin layer-
・ DPHA (hexafunctional acrylate, manufactured by Sartomer) 95 parts by mass ・ Lucirin TPO (manufactured by BASF) 5 parts by mass

(Example 13)
In Example 3, except that the base material was changed to PET (polyethylene terephthalate) and the UV curable resin composition for the intermediate layer was changed to the composition shown below, the lipophilic laminate was prepared in the same manner as in Example 3. Produced.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

-UV curable resin composition for intermediate layer-
・ Ogsol EA-F5003 (Osaka Gas Chemical Co., Ltd.) 30.0 parts by mass ・ Butyl acetate (solvent) 68.8 parts by mass ・ KP-323 (Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass ・ Irgacure 184D ( 0.9 mass parts ・ Irgacure 907 (manufactured by BASF Corporation) 0.3 mass parts

(Example 14)
In Example 3, except that the base material was changed to PET (polyethylene terephthalate) and the UV curable resin composition for the intermediate layer was changed to the composition shown below, the lipophilic laminate was prepared in the same manner as in Example 3. Produced.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

-UV curable resin composition for intermediate layer-
A-9300-1CL 20.0 parts by mass (ethoxylated isocyanuric acid triacrylate, manufactured by Shin-Nakamura Chemical Co., Ltd.)
・ Oxol EA-F5003 (Osaka Gas Chemical Co., Ltd.) 10.0 parts by mass ・ Butyl acetate (solvent) 68.8 parts by mass ・ KP-323 (Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass ・ Irgacure 184D ( 0.9 mass parts ・ Irgacure 907 (manufactured by BASF Corporation) 0.3 mass parts

(Example 15)
In Example 3, a lipophilic laminate was produced in the same manner as in Example 3 except that the base material was changed to TAC (triacetyl cellulose).
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 16)
In Example 3, a lipophilic laminate was produced in the same manner as in Example 3 except that the substrate was changed to PC (polycarbonate) and the UV curable resin composition for the intermediate layer was changed to the composition shown below. did.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

-UV curable resin composition for intermediate layer-
A-9300-1CL (manufactured by Shin-Nakamura Chemical Co., Ltd.) 15.0 parts by mass Ogsole EA-F5003 (manufactured by Osaka Gas Chemical Co., Ltd.) 15.0 parts by mass butyl acetate (solvent) 68.8 parts by mass KP-323 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass ・ Irgacure 184D (manufactured by BASF) 0.9 parts by mass ・ Irgacure 907 (manufactured by BASF) 0.3 parts by mass

(Example 17)
In Example 3, a lipophilic laminate was produced in the same manner as in Example 3 except that the base material was changed to PMMA (polymethyl methacrylate).
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Example 18)
In Example 2, a lipophilic laminate was produced in the same manner as in Example 2 except that the intermediate layer 1 and the intermediate layer 2 were laminated in this order using the following composition.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 3.

-UV curable resin composition for intermediate layer (intermediate layer 1)-
-A-9300-1CL (made by Shin-Nakamura Chemical Co., Ltd.) 15.0 mass parts-8BR-500 (made by Taisei Fine Chemical Co., Ltd.) 15.0 mass parts (solid content conversion)
-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0.9 parts by mass-Irgacure 907 (manufactured by BASF) 0 .3 parts by mass

-UV curable resin composition for intermediate layer (intermediate layer 2)-
-A-9300-1CL (made by Shin-Nakamura Chemical Co., Ltd.) 20.0 parts by mass-8BR-500 (made by Taisei Fine Chemical Co., Ltd.) 15.0 parts by mass (in terms of solid content)
-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0.9 parts by mass-Irgacure 907 (manufactured by BASF) 0 .3 parts by mass

(Example 19)
In Example 2, a lipophilic laminate was produced in the same manner as in Example 2 except that the intermediate layers 1 to 3 were laminated in this order using the following composition.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 4.

-UV curable resin composition for intermediate layer (intermediate layer 1)-
・ A-9300-1CL (made by Shin-Nakamura Chemical Co., Ltd.) 5.0 parts by mass ・ 8BR-500 (made by Taisei Fine Chemical Co., Ltd.) 25.0 parts by mass (in terms of solid content)
-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0.9 parts by mass-Irgacure 907 (manufactured by BASF) 0 .3 parts by mass

-UV curable resin composition for intermediate layer (intermediate layer 2)-
-A-9300-1CL (made by Shin-Nakamura Chemical Co., Ltd.) 15.0 mass parts-8BR-500 (made by Taisei Fine Chemical Co., Ltd.) 15.0 mass parts (solid content conversion)
-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0.9 parts by mass-Irgacure 907 (manufactured by BASF) 0 .3 parts by mass

-UV curable resin composition for intermediate layer (intermediate layer 3)-
-A-9300-1CL (made by Shin-Nakamura Chemical Co., Ltd.) 20.0 parts by mass-8BR-500 (made by Taisei Fine Chemical Co., Ltd.) 10.0 parts by mass (converted to solid content)
-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0.9 parts by mass-Irgacure 907 (manufactured by BASF) 0 .3 parts by mass

(Comparative Example 1)
In Example 1, the lipophilic laminated body was obtained like Example 1 except having changed the ultraviolet curable resin composition for intermediate | middle layers into the composition shown below.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

-UV curable resin composition for intermediate layer-
-CN985B88 (Sartomer) 30.0 parts by mass-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0. 9 parts by mass-Irgacure 907 (manufactured by BASF) 0.3 parts by mass

(Comparative Example 2)
In Example 2, the lipophilic laminated body was obtained like Example 2 except having changed the ultraviolet curable resin composition for intermediate | middle layers into the composition shown below.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

-UV curable resin composition for intermediate layer-
-CN985B88 (Sartomer) 30.0 parts by mass-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0. 9 parts by mass-Irgacure 907 (manufactured by BASF) 0.3 parts by mass

(Comparative Example 3)
In Example 4, the lipophilic laminated body was obtained like Example 4 except having changed the ultraviolet curable resin composition for intermediate | middle layers into the composition shown below.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

-UV curable resin composition for intermediate layer-
-CN985B88 (Sartomer) 30.0 parts by mass-Butyl acetate (solvent) 68.8 parts by mass-KP-323 (Shin-Etsu Chemical Co., Ltd.) 0.003 parts by mass-Irgacure 184D (manufactured by BASF) 0. 9 parts by mass-Irgacure 907 (manufactured by BASF) 0.3 parts by mass

(Comparative Example 4)
In Example 1, a lipophilic laminate was obtained in the same manner as in Example 1 except that no intermediate layer was produced.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Comparative Example 5)
In Comparative Example 4, a lipophilic laminate was obtained in the same manner as in Comparative Example 4 except that the average thickness of the lipophilic resin layer was changed to 6.5 μm.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

(Comparative Examples 6-9)
In Example 1, a lipophilic laminate was obtained in the same manner as in Example 1 except that the base material was changed to the base material shown in Table 2 and no intermediate layer was produced.
About the produced lipophilic laminated body, evaluation similar to Example 1 was performed. The results are shown in Table 2.

In Examples 1-19, the lipophilic laminated body which has the fingerprint resistance which is hard to see even if a fingerprint adheres and can prevent an interference fringe was obtained. In particular, when the average thickness of the intermediate layer was 0.5 μm to 10.0 μm, the interference fringe prevention property was particularly excellent (Examples 1 to 6).
Even if the type of the resin base material was changed, it was difficult to see even when fingerprints were attached, and the effect of preventing interference fringes was maintained (Examples 13 to 17).

On the other hand, in Comparative Examples 1 to 3, since the difference between the refractive index of the intermediate layer and the refractive index of the lipophilic resin layer was 0, interference fringes occurred.
In Comparative Examples 4 to 9, interference fringes occurred because there was no intermediate layer. Further, the adhesion was insufficient.

  The lipophilic laminate of the present invention can be used by being bonded to a touch panel, a smartphone, a smartphone cover, a tablet PC, a home appliance, a cosmetic container, accessories, and the like. Further, the lipophilic laminate of the present invention uses in-mold molding, insert molding, and overlay molding to provide automotive interior parts such as door trims, instrument panels, center cluster / center console panels, shift knobs, shift knobs, and steering emblems. It can be used on the surface of automobile exterior parts such as surfaces and door handles.

211 resinous base material 212 lipophilic resin layer 213 intermediate layer 231 roll master 232 structure 236 uncured resin layer 237 active energy ray 311 resin base material 312 lipophilic resin layer 313 intermediate layer 331 plate-like master 332 structure 333 Uncured resin layer 334 Active energy ray

Claims (11)

A resin base material, at least one intermediate layer on the resin base material, and a lipophilic resin layer on the intermediate layer;
The lipophilic resin layer has either a fine convex part or a concave part on the surface,
The difference between the refractive index of the lipophilic resin layer and the refractive index of the intermediate layer in contact with the lipophilic resin layer is greater than 0,
The oleic acid contact angle on the surface of the lipophilic resin layer is 10 ° or less.   The lipophilic laminate according to claim 1, wherein the difference between the refractive index of the resin base material and the refractive index of the intermediate layer in contact with the resin base material is 0.03 to 0.1.   The lipophilic laminate according to any one of claims 1 to 2, wherein a difference between the refractive index of the lipophilic resin layer and the refractive index of the intermediate layer in contact with the lipophilic resin layer is 0.01 to 0.06. .   4. The lipophilic laminate according to claim 1, wherein the total of the average thickness of the lipophilic resin layer and the average thickness of the intermediate layer is 2.0 μm to 13.0 μm.   The lipophilic laminate according to any one of claims 1 to 4, wherein the oleic acid contact angle on the surface of the lipophilic resin layer is 5.0 ° or less.   The resin base material is any one of a triacetyl cellulose (TAC) film, a polyethylene terephthalate (PET) film, a polycarbonate (PC) film, a polymethyl methacrylate (PMMA) film, and a PC / PMMA laminate. The lipophilic laminate according to any one of the above.   The lipophilic laminate according to any one of claims 1 to 6, wherein the intermediate layer has 1 to 3 layers. It is a manufacturing method of the lipophilic laminated body in any one of Claim 1 to 7,
An uncured resin layer forming step of forming an uncured resin layer by applying an active energy ray-curable resin composition on the intermediate layer;
Adhering a transfer master having either a fine convex part or a concave to the uncured resin layer, irradiating the uncured resin layer to which the transfer master is in contact with an active energy ray to cure the uncured resin layer And a lipophilic resin layer forming step of forming a lipophilic resin layer by transferring any one of the fine protrusions and recesses.   The oleophilic laminate according to claim 8, wherein any one of the fine protrusions and recesses of the transfer master is formed by etching the surface of the transfer master using a photoresist having a predetermined pattern shape as a protective film. Production method.   9. The method for producing an oleophilic laminate according to claim 8, wherein any one of the fine convex portion and the concave portion of the transfer master is formed by irradiating the surface of the transfer master with laser to process the transfer master. . An article having the lipophilic laminate according to any one of claims 1 to 7 on a surface thereof.