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WO2018084052A1 - Panneau optique, procédé pour sa production, et dispositif - Google Patents

Panneau optique, procédé pour sa production, et dispositif Download PDF

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Publication number
WO2018084052A1
WO2018084052A1 PCT/JP2017/038542 JP2017038542W WO2018084052A1 WO 2018084052 A1 WO2018084052 A1 WO 2018084052A1 JP 2017038542 W JP2017038542 W JP 2017038542W WO 2018084052 A1 WO2018084052 A1 WO 2018084052A1
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WO
WIPO (PCT)
Prior art keywords
substance
region
optical panel
ionizing radiation
coating film
Prior art date
Application number
PCT/JP2017/038542
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English (en)
Japanese (ja)
Inventor
宏記 鈴木
Original Assignee
アルプス電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to CN201780076597.XA priority Critical patent/CN110073250A/zh
Priority to JP2018548959A priority patent/JP6924202B2/ja
Publication of WO2018084052A1 publication Critical patent/WO2018084052A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • C08J7/16—Chemical modification with polymerisable compounds
    • C08J7/18—Chemical modification with polymerisable compounds using wave energy or particle radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/111—Anti-reflection coatings using layers comprising organic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements

Definitions

  • the present invention relates to an optical panel, a method for manufacturing the same, and a device including the optical panel.
  • Patent Document 1 discloses an antireflection film laminated on a transparent base material, wherein the antireflection film includes a transparent resin and fine particles dispersed in the transparent resin.
  • the average distance between the centers is 50 to 800 nm
  • the arrangement structure of the fine particles in the antireflection film is an amorphous structure
  • the average height of the protrusions on the surface of the antireflection film is 40 to
  • An antireflection film characterized in that a concavo-convex shape in the range of 500 nm is formed is disclosed.
  • the fine particles dispersed in the film create irregularities on the surface of the antireflection film, and the irregularities are scattered to prevent external light from being reflected. And in order to form this unevenness
  • the present invention provided to solve the above problems is an optical panel including a base material having translucency and an appearance layer positioned on the base material, wherein the appearance is
  • the layer includes a first region having a relatively low reflectance of incident light from the exterior layer side of the optical panel and a second region having a relatively high reflectance, and the exterior layer includes a first resin system.
  • the surface of the first region includes a projecting point group made of the first resin material and projecting in the thickness direction of the appearance layer to scatter external light.
  • the above-described optical panel according to the present invention realizes an antireflection function that scatters external light by protruding point groups made of a resin material. Therefore, the appearance layer containing fine particles is separated from the expression of the antireflection function. Therefore, it is possible to increase the degree of freedom in designing the composition of the appearance layer.
  • the first region may have a different composition in the thickness direction of the appearance layer.
  • the ratio of the content of the first resin material on the side opposite to the side facing the substrate to the content of the second resin material on the side opposite to the side facing the substrate is the first on the side facing the substrate. It may be higher than the ratio of the content of the resin material to the content of the second resin material.
  • the protruding point group may protrude from the surface of the second region.
  • the first region and the second region may have the same overall composition and may have different composition distributions in the thickness direction of the appearance layer.
  • the first region and the second region are made of the same material for forming the appearance layer, and the first region and the second region are separately formed by performing different processes. Can do.
  • the present invention provides, as another aspect, an optical panel including a base material having translucency and an appearance layer positioned on the base material.
  • the appearance layer includes a first resin material and a second resin material, and a surface of the appearance layer is made of the first resin material in at least a part of the area.
  • a protruding point group that protrudes in the thickness direction and scatters external light.
  • Such an optical panel can also increase the degree of design freedom of the composition of the appearance layer, like the optical panel including the first region and the second region.
  • the region having the protruding point group may have a different composition in the thickness direction of the appearance layer.
  • the ratio of the content of the first resin material on the side opposite to the side facing the substrate to the content of the second resin material on the side opposite to the side facing the substrate is the first on the side facing the substrate. It may be higher than the ratio of the content of the resin material to the content of the second resin material.
  • the external layer may further include a filler component, and the external layer may not include the filler component.
  • the first resin material may include a polymer of a first substance that is ionizing radiation polymerizable, and the second resin material is different from the first substance.
  • the polymer of the 2nd substance of this may be included.
  • the appearance layer may further contain a polymerization initiator.
  • a third substance having compatibility with the first substance may be included.
  • the third substance is preferably a phenol compound, more preferably a phenol compound having a melting point of 100 ° C. or less, and particularly preferably a hindered phenol compound.
  • an optical panel including a base material having translucency and an appearance layer having a surface provided with a protruding point group located on the base material and scattering external light.
  • a production method includes an ionizing radiation polymerizable first substance, an ionizing radiation polymerizable second substance different from the first substance, and a first solvent that dissolves the first substance more easily than the second substance. And applying a liquid material containing a second solvent, which is easier to dissolve the second substance than the first substance and has a boiling point higher than that of the first solvent, to one surface of the substrate.
  • a step, wherein the third step Wherein the surface comprises the projecting point group appearance layer.
  • an appearance layer having an antireflection function can be produced with few restrictions on composition, and in particular, without including a filler component.
  • the appearance layer including the protruding point group on the entire surface may be formed from the deposited coating by irradiating the entire deposited coating with the ionizing radiation. .
  • an appearance layer having an antireflection function can be manufactured on the entire surface.
  • the appearance layer includes a first region having a surface including the protruding point group and a second region having a surface not including the protruding point group, and in the third step, the precipitation is performed.
  • the first coating film region which is a partial region of the coating film
  • the first substance and the second substance located in the first coating film region are polymerized, and the first Forming a region, and heating the second coating region not irradiated with the ionizing radiation in the deposited coating to increase the surface smoothness of the second coating region following the third step.
  • the liquid material may further contain a filler component.
  • the appearance layer contains a filler component.
  • the liquid material may not include a filler component.
  • the appearance layer does not contain a filler component. In this way, it is possible to set whether or not the appearance layer contains a filler component by changing the composition of the liquid.
  • the liquid may contain a polymerization initiator.
  • the polymerization of the first substance and the second substance can be performed by irradiation with electromagnetic waves such as visible light and ultraviolet light.
  • heating may be performed so that the precipitate of the first substance in the deposited coating is melted.
  • the surface of the deposited coating is roughened by the deposit of the first substance, so that the smoothness of the surface can be improved by dissolving the deposit of the first substance.
  • the liquid material may contain a third substance having compatibility with the first substance.
  • the precipitate containing the first substance formed in the second step contains the third substance, and the precipitate containing the first substance has a lower melting point than the precipitate made of the first substance.
  • the third substance is preferably a phenol compound, more preferably a phenol compound having a melting point of 100 ° C. or less, and particularly preferably a hindered phenol compound. By including the third substance, the smoothness and optical characteristics of the second region may be increased.
  • the present invention provides, as another aspect, an apparatus including the optical panel according to the above aspect of the present invention.
  • the present invention provides a transfer body including a transfer layer having a transfer source surface.
  • the transfer layer includes a first resin material containing a polymer of an ionizing radiation polymerizable first substance, and a polymer of a second substance of ionizing radiation polymerizable different from the first substance.
  • a second resin-based material wherein the transfer source surface includes a protruding point group made of the first resin-based material and protruding in the thickness direction of the transfer layer to scatter external light, and the transfer source in the transfer layer
  • the region including the surface has a different composition in the thickness direction of the transfer layer, and the ratio of the content of the first resin material on the transfer source surface side to the content of the second resin material is the transfer layer It is higher than the ratio of the content of the first resin material on the side opposite to the base surface side to the content of the second resin material.
  • the appearance layer of the optical panel according to the present invention can be used as a transfer layer having a transfer source surface for forming a transfer surface on a transfer object.
  • the transfer body may include a third substance having compatibility with the first substance.
  • the third substance is preferably a phenol compound, more preferably a phenol compound having a melting point of 100 ° C. or less, and particularly preferably a hindered phenol compound.
  • a method for producing a transfer body including a transfer layer having a transfer source surface including protruding point groups that scatter external light includes an ionizing radiation polymerizable first substance, an ionizing radiation polymerizable second substance different from the first substance, and a first solvent that dissolves the first substance more easily than the second substance. And applying a liquid material containing a second solvent, which is easier to dissolve the second substance than the first substance and has a boiling point higher than that of the first solvent, on one surface of the base material.
  • Comprising the step of The transfer flank with a point cloud is formed.
  • the transfer layer includes a first region having a surface including the protruding point group and a second region having a surface not including the protruding point group.
  • the third step By irradiating the ionizing radiation on the first coating region that is a partial region of the deposited coating, the first substance and the second substance located in the first coating region are polymerized, The first region is formed, and subsequently to the third step, the second coating region not irradiated with the ionizing radiation in the deposited coating is heated, and the surface smoothness of the second coating region is increased.
  • a fifth scan forming the second region. Tsu may be provided with a flop. According to this manufacturing method, a surface having excellent smoothness can be provided on the surface of the transfer layer on which the transfer source surface is located.
  • the fourth step heating may be performed so that the precipitate containing the first substance in the deposition coating is melted.
  • the liquid material contains a third material having compatibility with the first material
  • the precipitate containing the first material formed in the second step contains the third material
  • the precipitate containing one substance preferably has a lower melting point than the precipitate made of the first substance.
  • the third substance is preferably a phenol compound, more preferably a phenol compound having a melting point of 100 ° C. or less, and particularly preferably a hindered phenol compound.
  • an optical panel that does not require the presence of fine particles in order to perform an antireflection function, a method for manufacturing the optical panel, and an apparatus including the optical panel.
  • FIG. 1 is a partial cross-sectional view schematically showing an optical panel according to an embodiment of the present invention.
  • an optical panel 100 includes a base material 10 having translucency and an appearance layer 20 positioned on the base material 10.
  • the material constituting the base material 10 is not limited as long as it has appropriate translucency. Examples of such materials include polyethylene terephthalate, polycarbonate, acrylic resin, and glass.
  • the base material may be comprised from the laminated structure of the some member.
  • the appearance layer 20 may be provided so as to be in direct contact with the base material 10, or even if an intervening layer exists between the base material 10 and the appearance layer 20. Good. Such an intervening layer should have an appropriate translucency similarly to the substrate 10.
  • the appearance layer 20 includes a first region R1 having a relatively low reflectance of incident light from the appearance layer 20 side of the optical panel 100 and a second region R2 having a relatively high reflectance.
  • the appearance layer 20 includes a first resin material and a second resin material.
  • the surface R1A of the first region R1 includes a protruding point group 21 that is made of the first resin material and protrudes in the thickness direction of the appearance layer 20 to scatter external light.
  • the specific composition of the first resin material and the second resin material is not limited.
  • a polymer of an ionizing radiation polymerizable substance such as an acrylic resin or an epoxy resin may be contained.
  • ionizing radiation can directly or indirectly ionize atoms and molecules such as light (including infrared rays, visible light, and ultraviolet rays), electromagnetic waves such as X-rays, and electrons. Mean radiation.
  • the composition of the first resin material and the second resin material may be different or may be common.
  • the first resin material includes a polymer of a first substance that is ionizing radiation polymerizable
  • the second resin material includes a polymer of a second substance that is ionizing radiation polymerizable that is different from the first substance.
  • the appearance layer 20 may contain a polymerization initiator.
  • the polymerization initiator include photopolymerization initiators such as ⁇ -hydroxyalkylphenone and bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide.
  • the second region R2 of the appearance layer 20 shown in FIG. 1 is composed of a layer 24 that is formed entirely of a mixed material of the first resin material and the second resin material in the thickness direction of the appearance layer 20.
  • the thickness of the appearance layer 20 is not limited. Illustratively, the thickness of the appearance layer 20 may be 0.001 ⁇ m or more and 200 ⁇ m or less, and preferably 1 ⁇ m or more and 20 ⁇ m or less.
  • the first region R1 of the outer layer 20 includes the protruding point group 21, the reflectance of incident light from the outer layer 20 side of the optical panel 100 is lower than the similar reflectance in the second region R2.
  • the first region R1 of the appearance layer 20 may have a total light reflectance defined by JIS K7375: 2008 of 10% or less and preferably 5% or less.
  • the filler component is an optional component.
  • the proportion and arrangement of the size of the first region R1 in the entire appearance layer 20 and the proportion and arrangement of the size of the second region R2 in the entire appearance layer 20 should be appropriately set according to the application.
  • the first region R1 is located in the center of the appearance layer 20 in plan view
  • the second region R2 is located so as to surround the first region R1 in plan view.
  • the appearance layer 20 may have a region other than the first region R1 and the second region R2.
  • the surface (first region surface) R1A provided with the protruding point group 21 is rougher than the surface of the second region R2.
  • the maximum height Rz of the surface roughness defined in JIS B0601: 2001 is preferably 0.5 ⁇ m or more, more preferably 1 ⁇ m or more. It is particularly preferable that the thickness is 5 ⁇ m or more.
  • the upper limit of the surface roughness of the first region surface R1A is not limited, but if the surface roughness of the first region surface R1A is excessively large, the translucency of the optical panel 100 may be lowered.
  • the total light transmittance specified in JIS 7375: 2008 is 50% or more (preferably 70% or more, more preferably 90% or more).
  • the surface roughness of the first region surface R1A should be set so as to have a degree of translucency.
  • the protruding point group 21 located on the first region surface R1A protrudes from the surface (second region surface) R2A of the second region R2.
  • the protruding point group 21 By disposing the protruding point group 21 in this way, it may be possible to increase the degree of freedom of composition in a portion other than the protruding point group 21 of the appearance layer 20.
  • the antireflection film described in Patent Document 1 has a structure in which fine particles are dispersed in a transparent resin, and by selectively removing the transparent resin, irregularities are formed on the surface, thereby preventing the reflection. A surface having a function is formed. Therefore, the surface of the region where the unevenness (corresponding to the protruding point group 21 of the appearance layer 20) is formed is inevitably depressed more than the surface of the region having no unevenness.
  • the first region R1 and the second region R2 may have the same overall composition, and the composition distribution in the thickness direction of the appearance layer 20 may be different. In this case, as will be described later, it may be possible to form the first region R1 and the second region R2 by adjusting the process from a common member. In this case, the optical panel 100 is productive. Therefore, quality stability is also excellent.
  • the composition of the first region R1 is different in the thickness direction of the external layer 20.
  • the thickness direction of the appearance layer 20 it has at least a two-layer structure of the upper layer portion 22 (including the protruding point group 21. The same applies hereinafter) and the lower layer portion 23 on the substrate 10 side.
  • the upper layer portion 22 is made of a first resin material
  • the lower layer portion 23 is made of a second resin material. In the interface region between the upper layer portion 22 and the lower layer portion 23, both portions (the upper layer portion 22 and the lower layer portion 23) may be clearly separated as shown in FIG.
  • the upper layer portion 22 may contain the first resin material as the main component and the second resin material to some extent
  • the lower layer portion 23 may contain the second resin material as the main component and the first resin material to some extent. It may be. That is, in the first region R1, the ratio of the content of the first resin material in the upper layer portion 22 (the side opposite to the side facing the base material 10) to the content of the second resin material is lower layer portion 23 (base The ratio of the content of the first resin material on the side facing the material 10 to the content of the second resin material is higher.
  • the appearance layer 20 of the optical panel 100 may further include a filler component or may not include a filler component.
  • a filler component When the appearance layer 20 contains a filler component, a whitening phenomenon may occur in the appearance layer 20 because the adhesiveness between the filler component and the matrix component (resin component) changes over time. . Therefore, it may be preferable that the appearance layer 20 does not contain a filler component.
  • the type of the filler component is not particularly limited.
  • the filler component may be composed of an inorganic material such as silica, zirconia, and titania, or may be composed of an organic material such as a melamine resin.
  • the filler component may contain both an organic material and an inorganic material.
  • the particle size distribution of the filler component is also arbitrary. On the other hand, the layer corresponding to the appearance layer described in Patent Document 1 needs to precisely control the particle size distribution of the filler component as described above.
  • the appearance layer 20 included in the optical panel according to the embodiment of the present invention described above includes the first region R1 including the protruding point group 21 and the second region R2 including no protruding point group. It is not limited. For example, the entire surface of the appearance layer 20 may include the protruding point group 21 or may include another region having optical characteristics different from those of the first region R1 and the second region R2.
  • the manufacturing method of the optical panel including the appearance layer according to the embodiment of the present invention is not limited. If the manufacturing method described below is adopted, an optical panel according to an embodiment of the present invention can be efficiently manufactured.
  • FIG. 2 is a flowchart showing a method for manufacturing an optical panel according to an embodiment of the present invention.
  • An optical panel manufacturing method according to an embodiment of the present invention includes first to third steps described below, and further includes a fourth step and a fifth step.
  • By performing the first step to the third step it is possible to manufacture an optical panel including an appearance layer having a protruding point group on the entire surface.
  • By performing the first step to the fifth step it is possible to manufacture the optical panel 100 including the appearance layer 20 composed of the first region R1 and the second region R2 as shown in FIG.
  • the case where the optical panel 100 shown in FIG. 1 is manufactured by performing the first step to the fifth step as shown in FIG. 2 is taken as a specific example.
  • FIG. 3 is a partial cross-sectional view schematically showing a manufacturing method (first step) of an optical panel according to an embodiment of the present invention.
  • FIG. 4 is a partial cross-sectional view schematically showing a method for manufacturing an optical panel (second step) according to an embodiment of the present invention.
  • FIG. 5 is a partial cross-sectional view schematically showing a method for manufacturing an optical panel (third step) according to an embodiment of the present invention.
  • FIG. 6 is a partial cross-sectional view schematically showing a method for manufacturing an optical panel (after the third step) according to an embodiment of the present invention.
  • FIG. 7 is a partial cross-sectional view schematically showing a method for manufacturing an optical panel (fourth step) according to an embodiment of the present invention.
  • FIG. 8 is a partial cross-sectional view schematically showing a method for manufacturing an optical panel (fifth step) according to an embodiment of the present invention.
  • a liquid containing a second solvent that easily dissolves the second substance and has a boiling point higher than that of one solvent is prepared.
  • the liquid material may not be composed of only the liquid, and may contain a filler component.
  • Second material polyether-based acrylate resin
  • Second solvent 1-propanol
  • Each of the first substance, the first solvent, the second substance, and the second solvent may be composed of one kind of substance, or may be composed of a mixture of plural kinds of substances.
  • the SP value of the first substance is close to the SP value of the first solvent
  • the second substance can be easily dissolved in the second solvent.
  • the first substance and the second substance are both acrylic resins such as acrylate resins and methacrylate resins
  • the internal structure is changed (as examples of the internal structure, ether structure, polyester structure, urethane Structure, phenol structure, etc.), the SP value can be changed.
  • the SP value may be changed by changing the molecular weight.
  • the first solvent and the second solvent are mixed.
  • a liquid material can be obtained by dissolving the first substance and the second substance in the mixed solvent.
  • the first substance is dissolved in the first solvent to obtain the first solution
  • the second substance is dissolved in the second solvent to obtain the second solution
  • the first solution and the second solution are mixed. You may obtain a liquid by.
  • the timing of adding the filler component is arbitrary.
  • a liquid material is applied to one surface of the substrate 10 to form a coating film 30 on the substrate 10 (S101).
  • a state in which the first substance 41 and the second substance 42 are dissolved in the mixed solvent 31 composed of the first solvent and the second solvent is shown as the first substance. 41 and the second substance 42 are represented by broken lines. Actually, the first substance 41 and the second substance 42 are not dissolved in the mixed solvent 31 in the coating film 30 and cannot be individually identified.
  • the first substance 41 is deposited on the surface of the coating film to obtain a deposited coating film 34 (S102, FIG. 4).
  • the method for volatilizing the first solvent 32 is not limited. As described above, since the first solvent 32 has a boiling point lower than that of the second solvent 33, if the coating film 30 on the substrate 10 is allowed to stand or is gently dried, the first solvent 32 starts from the mixed solvent 31 in the coating film 30. The solvent 32 is volatilized preferentially over the second solvent 33 and the content of the first solvent 32 in the coating film 30 is reduced.
  • the first substance 41 is mainly dissolved in the first solvent 32, when the amount of the first solvent 32 in the coating film 30 decreases, the amount of the first substance 41 that can be dissolved in the coating film 30 decreases. As a result, as shown in FIG. 4, the first substance 40 becomes a precipitate 41 c and is located on the coating film 30, and the deposited coating film 34 is formed on the substrate 10.
  • all the first solvents 32 contained in the mixed solvent 31 of the coating film 30 are volatilized, and all of the solvents in the deposited coating film 34 are composed of the second solvent 33, but are not limited thereto. .
  • the first solvent 32 may remain to some extent in the solvent contained in the deposited coating film 34.
  • all the 1st substances 41 contained in the coating film 30 become the precipitate 41c, it is not limited to this.
  • a certain amount of the first substance 41 may be dissolved in the solvent of the deposited coating film 34.
  • the precipitate 41c may positively contain a substance (third substance) other than the first substance 40.
  • the first substance 41 and the second substance 42 located in the region irradiated with ionizing radiation are polymerized by irradiating at least a part of the deposited coating film 34 with ionizing radiation (S103, FIG. 5, FIG. 6).
  • a mask MSK having an opening in a region corresponding to the first region R1 is used.
  • the ionizing radiation (in this case, ultraviolet light) UVL from the light source LRD is applied to the first coating region R11, which is a partial region of the deposition coating 34, located in the opening of the mask MSK.
  • the first substance 41 (at least a part of the precipitate 41c) and the second substance 42 located in the first coating film region R11 are polymerized, and the whole A first region R1 made of the first resin material and the second resin material is formed.
  • the light source LRD and the mask MSK are arranged on the back side of the base material 10 (on the side opposite to the side on which the deposited coating 34 of the base material 10 is provided), and ionizing radiation is applied from the back side of the base material 10 (in the case of FIG. 5).
  • UVL UVL
  • the first coating 41 and the second coating 42 can be polymerized by irradiating the deposition coating 34 with ionizing radiation UVL that has passed through the substrate 10.
  • the first region R1 shown in FIG. 6 has a different composition distribution in the thickness direction of the deposited coating film 34. Specifically, a portion (lower layer portion) 23 made of the second resin material formed from the second substance 42 is located on the substrate 10 side. Formed from the first substance 41, including the protruding point group 21 made of the first resin-based material formed from the precipitate 41 c of the first substance 41 on the side far from the base material 10 including the protruding point group 21. A portion (upper layer portion) 22 made of the first resin-based material is positioned.
  • the surface R1A including the protruding point group 21 of the appearance layer 20 is formed by performing the third step.
  • the third step if the entire coating film 34 is irradiated with ionizing radiation UVL without using the mask MSK, the appearance layer 20 having the protruding point group 21 on the entire surface can be formed from the coating film 34. .
  • the second coating region R12 which is a region where the ionizing radiation UVL is not irradiated on the deposited coating 34, is heated to improve the surface smoothness of the second coating region R12 (S104, FIG. 7).
  • the heating means is not limited.
  • the second coating film region R ⁇ b> 12 is heated by a heating device HD that can heat the entire appearance layer 20.
  • the first region R1 is also heated by the heating device HD, but since the polymerization reaction has already been completed in the first region R1, the shape of the protruding point group 21 is greatly changed by the heat from the heating device HD. Absent.
  • the precipitate 41c is appropriately melted.
  • the surface smoothness of the second coating film region R12 of the deposition coating 34 can be enhanced by diffusing into the deposition coating 34, while the first region R1 provided by the protruding point group 21 is roughened. It is possible to maintain the state.
  • the liquid has compatibility with the first substance 41, and the precipitate 41c It is preferable to contain a third substance that promotes dissolution in the second solvent 33.
  • the precipitate 41c formed in the second step includes the first substance 41 and the third substance.
  • the third substance is selected so that the melting point of the precipitate 41c is lower than the melting point of the first substance precipitate. From this viewpoint, it is preferable that the melting point of the third substance is low.
  • the melting point of the third substance is preferably not more than twice the melting point of the first substance 41, and more preferably not more than 1.5 times the melting point of the first substance 41. .
  • the second region R2 of the appearance layer 20 formed from the deposited coating 34 located in the second coating region R12 poor appearance due to the non-uniformity of the appearance layer 20 such as fogging and glare is unlikely to occur.
  • the cloudiness can be quantitatively evaluated by haze (JIS K7136: 2000).
  • the third substance contained in the liquid remains in the appearance layer 20. Therefore, when the outer layer 20 contains the third substance, the second region R2 of the outer layer 20 is likely to have high surface smoothness, and is also caused by non-uniformity of the outer layer 20 such as cloudiness or glare. Appearance is unlikely to occur.
  • the third substance has a functional group common to the functional group of the first substance 41, so that compatibility with the first substance 41 may be realized.
  • the third substance when the first substance 41 has a hydroxyl group, the third substance also has a hydroxyl group, whereby compatibility with the first substance 41 can be realized.
  • the third substance can be dissolved in the mixed solvent 31 or the first solvent 32 from the viewpoint of enhancing the handleability and enhancing the uniformity of the coating film 30 and the appearance layer 20.
  • the amount of addition based on the sum of the mass of the first substance 41 of the third substance and the mass of the second substance 42 is not limited. As long as the uniformity of the coating film 30 and the appearance layer 20 can be ensured, the higher the amount of the third substance added, the lower the melting point of the precipitate 41c, which is preferable.
  • Examples of the third substance having a hydroxyl group include a phenolic compound (a compound having a site in which a hydroxyl group is bonded to an aromatic ring), and a phenolic compound having a melting point of 100 ° C. or lower is a preferred example. More preferred examples include a series compound, and a hindered phenol compound having a melting point of 100 ° C. or lower can be mentioned as a particularly preferred example. As a specific example of such a hindered phenol compound having a melting point of 100 ° C. or lower, octadecyl 3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate used in Examples described later is used. , Butylhydroxyanisole, 2,6-di-tert-butyl-4-methylphenol, and 4-tert-butylphenol.
  • the second coating film region R12 in which the surface smoothness is improved by the execution of the fourth step is irradiated with the ionizing radiation UVL from the light source LRD, thereby being positioned in the second coating film region R12.
  • the first substance 41 and the second substance 42 are polymerized to form a second region R2 made of the first resin material and the second resin material (S105, FIG. 8).
  • the optical panel 100 including the appearance layer 20 having the first region R1 and the second region R2 is manufactured.
  • the conditions of irradiation with ionizing radiation UVL from the light source LRD performed in the second step and the fifth step are the size of the irradiation region, the types of the first substance 41 and the second substance 42, the thickness of the deposited coating film 34, and the like. It should be set as appropriate in consideration.
  • the protruding point group 21 that directly performs the antireflection function is made of the resin-based material. Therefore, whether or not the liquid material contains the filler component and the appearance layer 20 has the antireflection function. It can be set independently whether it has or not. Therefore, the liquid material may further include a filler component or may not include a filler component.
  • the liquid material may contain a polymerization initiator.
  • the polymerization of the first substance 41 and the second substance 42 can be performed by irradiation with electromagnetic waves such as ultraviolet light.
  • electromagnetic waves such as ultraviolet light.
  • Specific examples of the polymerization initiator are as described above.
  • the fourth step heating is performed so that the precipitate 41c of the first substance 41 deposited in the deposited coating film 34 is melted, but the present invention is not limited to this.
  • the precipitation coating 34 is heated, so that the solubility of the precipitate 41 c of the first substance 41 in the second solvent 33 is increased, and the first substance 41 is dissolved in the second solvent 33, whereby the precipitate 41c may disappear and the surface smoothness of the deposited coating film 34 may increase.
  • a device includes the optical panel 100 according to the above-described embodiment of the present invention.
  • Specific examples of such devices include portable information terminals such as smartphones, mobile phones, and notebook computers; image display devices such as TVs and car navigation systems; instrument panels (instrument panels) of moving bodies such as automobiles and airplanes, console panels, and the like. Can be mentioned. Since the device according to an embodiment of the present invention includes the optical panel 100 having an antireflection function, the display image has excellent visibility.
  • the appearance layer 20 of the optical panel 100 can be used as a transfer layer having a transfer source surface for forming a transfer surface on a transfer object.
  • a transfer surface that is the reverse surface of the transfer original surface can be formed on the transfer object.
  • the transfer layer includes a first resin material containing a polymer of an ionizing radiation polymerizable first substance, and a second resin containing a polymer of an ionizing radiation polymerizable second substance different from the first substance.
  • the transfer source surface includes a resin-based material, and includes a protruding point group that is made of the first resin-based material and protrudes in the thickness direction of the transfer layer and scatters external light.
  • the composition differs in the layer thickness direction, and the ratio of the content of the first resin material on the transfer source surface side to the content of the second resin material is the first resin system on the side opposite to the transfer source surface side. It is higher than the ratio of the content of the material to the content of the second resin material.
  • the transfer body may include a third substance having compatibility with the first substance. Since the other characteristics of the transfer layer are the same as those of the appearance layer 20, the description thereof is omitted.
  • the transfer body can be manufactured by the same manufacturing method as that of the optical panel 100.
  • a manufacturing method includes an ionizing radiation polymerizable first substance, an ionizing radiation polymerizable second substance different from the first substance, a first solvent that dissolves the first substance more easily than the second substance, A liquid material containing a second solvent that is easier to dissolve the second substance than the substance and has a higher boiling point than the first solvent is applied to one surface of the substrate to form a coating film on the substrate.
  • a third step of polymerizing the first substance and the second substance located in the region irradiated with the ionizing radiation by irradiating the ionizing radiation to the region of the portion, and the transfer source including the protruding point group by the third step A surface is formed.
  • the base material does not need to have translucency.
  • the surface of the substrate on which the liquid material is applied need not be a flat surface, but a flat surface is preferable from the viewpoint of increasing the uniformity of the thickness of the coating film.
  • the substrate may not be a constituent element of the transfer body. That is, when a transfer layer having a transfer source surface is formed after the third step, the transfer layer is peeled off from the substrate, and the transfer layer alone or a surface opposite to the surface on which the transfer source surface is located is separated. A transfer body provided with the member and a transfer layer may be obtained so as to face the member.
  • the transfer layer is composed of a first region having a surface having a protruding point group and a second region having a surface not having the protruding point group.
  • heating may be performed so that the precipitate containing the first substance in the deposited coating is melted.
  • the liquid body contains a third substance having compatibility with the first substance
  • the precipitate containing the first substance formed in the second step contains the third substance
  • the precipitate containing the first substance Is preferably lower in melting point than the precipitate made of the first substance.
  • the following materials were prepared as the first substance, the first solvent, the second substance, and the second solvent.
  • the first substance and the second substance are acrylic resins, and the SP values as the substances are made different from each other by changing the structure (ether structure, polyester structure, urethane structure, phenol structure, etc.) in the inside. It is set.
  • the melting point of the first substance was 48 ° C.
  • Multifunctional acrylate resin penentaerythritol triacrylate
  • 1st solvent Methyl isobutyl ketone
  • 2nd substance Polyether-type acrylate resin (It is a urethane prepolymer which has a phenyl group, and has SP value 1.2 times with respect to SP value of polyfunctional acrylate resin.)
  • Second solvent 1-propanol (having an SP value of 1.37 times that of methyl isobutyl ketone)
  • the first substance 15g was dissolved in 50 mL of the first solvent to obtain a first solution, and the second substance 15g was dissolved in 50 mL of the second solvent to obtain a second solution.
  • 50 mL of 1st solution and 50 mL of 2nd solution were mixed, and the polymerization initiator was further added (addition amount: 2 mass% with respect to solid content), and the mixed solution was obtained.
  • the polymerization initiator used was one of the following two types (see Table 1).
  • Polymerization initiator 1 Ketone-based polymerization initiator ("Irgacure 184" manufactured by BASF)
  • Polymerization initiator 2 Phosphine oxide polymerization initiator ("Irgacure 819" manufactured by BASF)
  • the liquid material made of the obtained mixed solution was applied onto a substrate made of polycarbonate to obtain a coating film (first step).
  • the thickness of the coating film immediately after coating was about 10 ⁇ m.
  • the first solvent was generally volatilized by leaving it for about 1 minute, and the first substance in the coating film was deposited on the substrate. A deposited coating was obtained (second step).
  • a mask having an opening in an area corresponding to the view area is prepared, placed on the deposited coating film, the first coating film area exposed by the opening is irradiated with ultraviolet light from a light source, and the first coating film area is exposed.
  • a first region was formed (third step).
  • the type of light source used, illuminance (unit: mW / cm 2 ), and integrated dose (unit: mJ / cm 2 ) were as shown in Table 1.
  • the deposited coating film having a partially polymerized region (first region) is heated (80 ° C., 10 minutes), and in an unpolymerized region. A precipitate of the first substance existing in a certain second coating film region was melted to increase the surface smoothness of the second coating film region (fourth step).
  • the entire region was irradiated with ultraviolet light from a light source to form a second region from the second coating region, and an appearance layer was obtained on the substrate (fifth step).
  • the type of light source used, illuminance (unit: mW / cm 2 ), and integrated dose (unit: mJ / cm 2 ) were as shown in Table 1.
  • the roughness (the maximum height Rz of the surface roughness defined in JIS B0601: 2001) of the first region and the second region of the appearance layer obtained was measured. The results are shown in Table 2. Further, based on the difference between the roughness of the first region and the roughness of the second region, an evaluation was made as to whether or not an appearance layer partially having an antireflection function could be produced. The evaluation results are shown in Table 2. Specifically, when the maximum height Rz of the surface roughness in the first region is 0.5 ⁇ m or more larger than the maximum height Rz of the surface roughness in the roughness of the second region, the antireflection function. It was judged that an appearance layer having a part of the surface could be made ("A" in Table 2), and if the above difference was less than 0.5 ⁇ m, a part having an antireflection function was made. ("B" in Table 2).
  • the protruding point group is appropriately formed, and the protruding point group is maintained even by subsequent heating. It was confirmed. It is also confirmed that the second region formed from the second coating region can be made a smooth surface by appropriately dissolving the precipitate of the first substance formed in the second coating region by heating. It was done. That is, it was confirmed that by performing the manufacturing method according to one embodiment of the present invention, an appearance layer having an antireflection function region and a highly reflective region can be manufactured.
  • Example 6 to Example 13 25 g of the first substance used in Example 1 was dissolved in 50 mL of the first solvent to obtain a first solution, and 25 g of the second substance was dissolved in 50 mL of the second solvent to obtain a second solution. 50 mL of the first solution and 50 mL of the second solution are mixed, and further, a ketone polymerization initiator (“Irgacure 184” manufactured by BASF) is added as a polymerization initiator by 2 mass% with respect to the solid content, and the mixed solution is Obtained. To this mixed solution, the third substance was added in an addition amount (unit: mass%) shown in Table 3 based on the sum of the mass of the first substance and the mass of the second substance.
  • a ketone polymerization initiator (“Irgacure 184” manufactured by BASF)
  • the substance names and melting points of the third substances according to the respective examples are as shown in Table 3. Since the third substance has a hydroxyl group and is common to the first substance in that it has a hydroxyl group, the third substance is compatible with the first substance. Therefore, the precipitate formed using the liquid material to which the third substance is added includes the first substance and the third substance.
  • An appearance layer having a first region and a second region was formed on the substrate in the same manner as in Example 1 except that the thickness of the coating film immediately after coating was set to 14 ⁇ m using a # 12 bar coater.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Surface Treatment Of Optical Elements (AREA)

Abstract

L'invention concerne un panneau optique 100 qui n'impose pas la présence de particules fines pour l'obtention d'une fonction antireflet. Ce panneau optique 100 est muni d'un substrat 10 transmettant la lumière et d'une couche extérieure 20 qui est positionnée sur le substrat 10. La couche extérieure 20 comporte: une première région R1 qui présente une réflectance relativement basse par rapport à une lumière incidente provenant du côté couche extérieure 20 du panneau optique 100; et une deuxième région R2 qui présente une réflectance relativement élevée par rapport à la lumière incidente. La couche extérieure 20 contient un premier matériau à base de résine et un deuxième matériau à base de résine; et une surface R1A de la première région R1 est dotée d'un groupe 21 de protubérances qui sont formées du premier matériau à base de résine et font saillie dans le sens de l'épaisseur de la couche extérieure de façon à diffuser la lumière extérieure.
PCT/JP2017/038542 2016-11-01 2017-10-25 Panneau optique, procédé pour sa production, et dispositif WO2018084052A1 (fr)

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