WO2015108159A1 - 粘着剤層を有する光学部材積層体及びその製造方法 - Google Patents
粘着剤層を有する光学部材積層体及びその製造方法 Download PDFInfo
- Publication number
- WO2015108159A1 WO2015108159A1 PCT/JP2015/051130 JP2015051130W WO2015108159A1 WO 2015108159 A1 WO2015108159 A1 WO 2015108159A1 JP 2015051130 W JP2015051130 W JP 2015051130W WO 2015108159 A1 WO2015108159 A1 WO 2015108159A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- refractive index
- optical member
- pressure
- sensitive adhesive
- adhesive layer
- Prior art date
Links
Images
Classifications
-
- 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
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- 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
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00663—Production of light guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00663—Production of light guides
- B29D11/00682—Production of light guides with a refractive index gradient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0073—Optical laminates
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/418—Refractive
-
- 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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
- B32B2309/105—Thickness
-
- 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
- B32B2457/00—Electrical equipment
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/206—Organic displays, e.g. OLED
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
- C09K2323/035—Ester polymer, e.g. polycarbonate, polyacrylate or polyester
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/05—Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/05—Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
- C09K2323/057—Ester polymer, e.g. polycarbonate, polyacrylate or polyester
Definitions
- the present invention relates to an optical member laminate having an adhesive layer and a method for producing the same.
- the present invention relates to an optical member laminate having a pressure-sensitive adhesive layer for joining a transparent optical member to another optical member, and a method for producing the same.
- a display device such as a liquid crystal display device or an organic EL display device is a pressure-sensitive adhesive for bonding a transparent cover member such as a polarizing film, a retardation film, a cover glass, and other various transparent optical members to other optical members.
- a transparent cover member such as a polarizing film, a retardation film, a cover glass, and other various transparent optical members to other optical members.
- an adhesive layer is disposed between two optical members to be bonded, and the two optical members are bonded together by pressing them together to form an optical member laminate.
- the optical member laminate having such a configuration is arranged in the display device such that the transparent optical member side is the viewing side. In this configuration, when external light enters from the viewing-side transparent optical member, there is a problem that the incident light is reflected at the interface between the adhesive layer and the non-viewing-side optical member and returns to the viewing side. This problem is particularly noticeable when the incident angle of external light is shallow.
- the surface of the bonded optical member to which the transparent optical member is bonded is made of patterned ITO (indium tin oxide) or the like.
- ITO indium tin oxide
- a transparent and conductive layer is formed.
- the pattern of the transparent conductive layer becomes visible from the viewing side due to the influence of internal reflection of incident light at the interface between the adhesive layer and the transparent conductive layer. Is pointed out.
- Patent Document 1 discloses an adhesive composition that can reduce total reflection of light at an interface between a transparent optical member and an adhesive layer and an interface between the adhesive layer and the bonded optical member. Disclose. It is described that the composition disclosed here has a high refractive index after drying and / or curing, and is close to the refractive index of the transparent optical member and the bonded optical member. The teaching of Patent Document 1 is that the entire pressure-sensitive adhesive layer that joins two optical members has a refractive index close to that of the two optical members.
- Patent Document 2 discloses a refraction having a configuration in which zirconium oxide or titanium oxide particles having a dispersion average particle diameter of 1 nm or more and 20 nm or less are dispersed over the entire thickness of a transparent adhesive made of an acrylic resin. Disclosed is an adhesive with an adjusted rate. In this pressure-sensitive adhesive, since zirconium oxide or titanium oxide particles, which are high refractive index materials, are mixed in a transparent pressure-sensitive adhesive, the refractive index of the entire pressure-sensitive adhesive layer is increased, and the above-described interface reflection can be suppressed. Conceivable.
- Patent Document 3 proposes to coat metal oxide particles dispersed in an adhesive with a polymer in order to improve the technique described in Patent Document 2.
- Patent Document 3 teaches that since the metal oxide is exposed on the surface of the pressure-sensitive adhesive layer in the pressure-sensitive adhesive layer of Patent Document 2, there is a problem that the adhesiveness is lowered. This problem is solved by coating with a polymer.
- the technique proposed by Patent Document 3 may be able to improve to some extent the adhesiveness of the pressure-sensitive adhesive layer, many of the problems pointed out in relation to Patent Document 2 cannot be solved.
- the configuration described in Patent Document 3 is more expensive than the configuration of Patent Document 2 because the metal oxide particles are coated with a specific polymer.
- the main object of the present invention is to provide a structure of a laminate that can effectively suppress internal reflection in an optical member laminate using an adhesive layer that can be easily and inexpensively produced.
- Another object of the present invention is to effectively suppress internal reflection in the laminate by the configuration of the optical member laminate having an adhesive layer having a refractive index adjustment section.
- the present invention forms a refractive index adjustment section having a higher refractive index than the base material of the pressure-sensitive adhesive layer over a certain range from the surface of the pressure-sensitive adhesive layer to the thickness direction in order to achieve the above-mentioned object. This suppresses internal reflection of the optical member laminate.
- the present invention provides an optical member laminate including a transparent pressure-sensitive adhesive layer having a specific configuration for joining a transparent first optical member to a second optical member.
- the pressure-sensitive adhesive layer having a specific configuration includes a base pressure-sensitive adhesive section essentially formed of a pressure-sensitive adhesive base material from the first main surface facing the first optical member across the thickness direction, And a transparent and adhesive refractive index adjusting section formed in the thickness direction from the second main surface of the pressure-sensitive adhesive layer facing the second optical member.
- the refractive index adjusting section has a refractive index higher than that of the adhesive base material.
- the refractive index adjustment section of the pressure-sensitive adhesive layer may have a refractive index lower than that of the second optical member.
- a transparent conductive layer having a predetermined pattern is formed on the second optical member on the side facing the pressure-sensitive adhesive layer.
- the refractive index adjustment section is in contact with both the transparent conductive layer and the second optical member so as to fill a step between the transparent conductive layer and the second optical member, and the refractive index adjustment
- the use section has a refractive index lower than that of the transparent conductive layer.
- the second optical member is formed with a refractive index adjustment layer having a refractive index lower than the refractive index of the transparent conductive layer on the surface facing the pressure-sensitive adhesive layer, and the refractive index adjustment of the pressure-sensitive adhesive layer.
- the section for use may have a refractive index higher than the refractive index of the refractive index adjusting layer formed on the surface of the second optical member.
- the refractive index adjustment section preferably has a thickness of 20 nm to 600 nm.
- the refractive index adjusting section is configured such that particles of a high refractive index material having a higher refractive index than that of the adhesive material are dispersed in the same adhesive material as the adhesive base material.
- the average refractive index of the adjustment section can be increased.
- the refractive index adjustment section is a high refractive index material having a higher refractive index than the adhesive material in the same adhesive material as the adhesive base material.
- the refractive index of the transparent conductive layer is 1.75 to 2.14
- the refractive index of the adhesive base material is 1.40.
- the refractive index of the particles of the high refractive index material is preferably 1.60 to 2.74.
- the particles of the high refractive index material preferably have an average primary particle diameter of 3 nm to 100 nm by TEM observation.
- the high refractive index material may be one or more compounds selected from the group consisting of TiO 2 , ZrO 2 , CeO 2 , Al 2 O 3 , BaTiO 3 , Nb 2 O 5 , and SnO 2. .
- the region where the particles of the high refractive material are in contact with the second optical member and the adhesive material of the refractive index adjusting section are the second optical member.
- a matrix region in contact with the member is formed.
- the region where the particles of the high refractive material are in contact with the second optical member is preferably formed in an area ratio of 30 to 99%.
- the difference in refractive index between the high refractive index material particles and the adhesive base material is preferably 0.2 to 1.3.
- the refractive index adjusting section includes an organic material in the form of particles, polymer, or oligomer having a higher refractive index than the adhesive material in the same adhesive material as the adhesive base material. It may be configured to increase the average refractive index. Further, when the pressure-sensitive adhesive layer having this configuration is applied to a configuration in which a transparent conductive layer is formed on the second optical member, the refractive index of the transparent conductive layer is set to 1.75 to 2.14.
- the refractive index of the agent base material is preferably 1.40 to 1.55, and the refractive index of the organic material is preferably 1.59 to 2.04.
- the organic material having a high refractive index used here is not particularly limited, but in addition to a resin having an aromatic ring such as styrene, a resin containing a heteroatom such as sulfur or nitrogen (for example, a thiol or triazine ring is included).
- Polymer The particles include nanometer-sized organic nanoparticles and spherical polymers, and the particle diameter is preferably 3 nm to 100 nm in average primary particle diameter by TEM observation.
- the pressure-sensitive adhesive layer preferably has a total light transmittance of 80% or more.
- the particles of the high refractive index material can include a portion where a plurality of particles are present in the form of an aggregate.
- the particles of the high refractive material included in the refractive index adjustment section are present at irregular depths in the thickness direction of the pressure-sensitive adhesive layer.
- the present invention provides a method for suppressing internal reflection in an optical member laminate.
- the second optical member and the transparent conductive layer of the pressure-sensitive adhesive layer are bonded to the pressure-sensitive adhesive layer for bonding the transparent first optical member to the second optical member on which the transparent conductive layer having a predetermined pattern is formed.
- the transparent conductive layer and the second optical layer With the adhesive refractive index adjustment section facing the transparent conductive layer and the second optical member, and the opposite surface of the adhesive layer facing the first optical member, the transparent conductive layer and the second optical layer
- the transparent adhesive refractive index adjusting section is bonded onto the member, the opposite surface of the adhesive layer is bonded to the first optical member, and the refractive index adjusting section is connected to the transparent conductive layer and the transparent conductive layer.
- external light incident through the first optical member is at the interface between the section formed essentially by the adhesive base material in the adhesive layer and the refractive index adjustment section.
- the reflected light and the reflected light at the interface between the refractive index adjusting section and the second optical member can be at least partially offset by optical interference.
- the present invention provides a method for producing an optical member laminate including a transparent pressure-sensitive adhesive layer for joining a transparent first optical member to a second optical member.
- This method includes the step of forming a pressure-sensitive adhesive layer with a refractive index adjustment section.
- a pressure-sensitive adhesive layer essentially formed of a transparent pressure-sensitive adhesive base material and a coating liquid containing particles of a refractive index adjusting material having a higher refractive index than the pressure-sensitive adhesive base material are prepared.
- the coating liquid is applied to one surface of the pressure-sensitive adhesive layer, and the refractive index adjusting material particles contained in the coating liquid are permeated in the thickness direction from the one surface of the pressure-sensitive adhesive layer.
- the pressure-sensitive adhesive layer with a refractive index adjustment section is further bonded to the first optical member on the other surface which is the surface opposite to the one surface, and the second surface is bonded to the one surface. Joining the optical member.
- the refractive index adjustment section can have a refractive index lower than that of the second optical member.
- the second optical member a member in which a transparent conductive layer having a predetermined pattern is formed on the side facing the pressure-sensitive adhesive layer is used, and the refractive index adjustment section includes the transparent conductive layer and the second optical member. It joins both this transparent conductive layer and this 2nd optical member so that the level
- the refractive index adjustment section having a higher refractive index than the base material of the pressure-sensitive adhesive layer is formed in the thickness direction from one surface of the pressure-sensitive adhesive layer, a region having a high refractive index without increasing the haze value. Can be formed.
- the high refractive index region can adjust the refractive index difference between the second optical member and the reflection at the interface between the pressure-sensitive adhesive layer and the second optical member.
- the refractive index of the refractive index adjustment section of the adhesive layer with respect to the refractive index of the transparent conductive layer and the second optical member is set. By adjusting, interface reflection can be suppressed.
- FIG. 2 shows a process for producing the pressure-sensitive adhesive layer shown in FIG. 2, (a) is a dispersion coating process, (b) is a high refractive index material particle penetration process, and (c) is a drying process.
- the structure of the 2nd optical member produced in the Example of this invention is shown, (a) (b) (c) shows 2nd optical member with ITO (1) (2) (3), respectively.
- the structure of the optical member laminated body by the Example of this invention is shown, (a) (b) (c) shows Example 1, 2, and 3, respectively. It is a 20000 times SEM photograph which shows the surface state of the division for refractive index adjustment of the adhesive layer produced by the Example of this invention.
- (a) and (b) are 30,000 times TEM cross-sectional photographs showing the high refractive index material particle distribution in the refractive index adjusting section in the pressure-sensitive adhesive layer obtained by different examples of the present invention.
- FIG. 1 is a cross-sectional view of an optical member laminate 1 showing an example of the simplest embodiment of the present invention.
- This optical member laminate 1 includes an optically transparent first optical member 2 and the first optical member laminate 1.
- the second optical member 4 is joined to the optical member 2 via an optically transparent adhesive layer 3.
- the transparent first optical member 2 is composed of a polarizing film, a retardation film, an optical film used for other optical display devices, or a transparent cover member such as a viewing side cover glass of an optical display device. Can do.
- the first optical member 2 is bonded to the first main surface 5 of the pressure-sensitive adhesive layer 3, and the second optical member 4 is bonded to the second main surface 6 of the pressure-sensitive adhesive layer 3.
- the transparent pressure-sensitive adhesive layer 3 includes a base pressure-sensitive adhesive section 3a essentially formed of a pressure-sensitive adhesive base material, and a refractive index adjustment having a higher refractive index than the base pressure-sensitive adhesive section 3a. And use section 3b.
- the refractive index of the adhesive base material forming the base adhesive section 3 a preferably has a refractive index close to the refractive index of the first optical member 2.
- the adhesive base material is not particularly limited as long as it is a transparent material having adhesiveness that can be used for optical applications.
- an acrylic adhesive, a rubber adhesive, a silicone adhesive, a polyester adhesive, a urethane adhesive, an epoxy adhesive, and a polyether adhesive can be used as appropriate. From the viewpoint of transparency, workability, durability, etc., it is preferable to use an acrylic pressure-sensitive adhesive.
- the pressure-sensitive adhesive base material any one of the above-mentioned pressure-sensitive adhesives can be used alone, or two or more kinds can be used in combination.
- the acrylic polymer used as the base polymer of the acrylic pressure-sensitive adhesive is not particularly limited, but is preferably a monomer homopolymer or copolymer mainly composed of (meth) acrylic acid alkyl ester.
- (meth) acryl is used to mean one or both of “acryl” and “methacryl”, and the same applies to other cases.
- the term “acrylic polymer” is used in the sense that in addition to the above-mentioned (meth) acrylic acid alkyl ester, other monomers copolymerizable therewith are also included.
- the refractive index of the adhesive base material is generally 1.40 to 1.55.
- the thickness of the pressure-sensitive adhesive layer 3 is not particularly limited, but is usually 5 ⁇ m to 500 ⁇ m, preferably 5 ⁇ m to 400 ⁇ m, and more preferably 5 ⁇ m to 500 ⁇ m.
- the thickness of the refractive index adjusting section 3b is preferably 20 nm to 600 nm, more preferably 20 nm to 300 nm, and still more preferably 20 nm to 200 nm.
- the boundary between the refractive index adjustment section 3b and the base adhesive section 3a has an irregular uneven shape. In the present invention, the thickness of the refractive index adjustment section 3b averages the measured depth of the uneven shape.
- the thickness of the base adhesive section is a value obtained by subtracting the thickness of the refractive index adjustment section 3b from the thickness of the adhesive layer 3.
- the total light transmittance of the entire pressure-sensitive adhesive layer 3 is 80% or more, preferably 90% or more, as a value measured in accordance with JIS K7361.
- the total light transmittance of the pressure-sensitive adhesive layer 3 is preferably as high as possible.
- the refractive index adjusting section 3b is formed by, for example, applying a predetermined amount of a resin material solution having a refractive index higher than that of the pressure-sensitive adhesive base material to one surface of the pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive base material and drying the solution.
- a resin material that can be used for this purpose for example, there is a pressure-sensitive adhesive composition described in Patent Document 1.
- a method may be employed in which a dispersion in which an organic substance having a higher refractive index than that of the pressure-sensitive adhesive base material, for example, a styrene oligomer is dispersed as a solid, is applied to the surface of the pressure-sensitive adhesive base material layer and dried.
- the particles of the high refractive index material are permeated from one side of the pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive base material, It is preferable that the particles of the high refractive index material are dispersed in a region adjacent to the surface.
- the pressure-sensitive adhesive layer 13 has a first main surface 15 and a second main surface 16 as well as the pressure-sensitive adhesive layer 3 of the embodiment shown in FIG. Although it is the structure which has the base adhesive classification
- the section for use 13b penetrates into the pressure-sensitive adhesive base material from the second main surface 16 to a depth in the thickness direction, and includes particles 17 of a high refractive index material dispersed in the pressure-sensitive adhesive base material. It is comprised so that it may have a refractive index higher than the agent division 13a.
- the refractive index of the high refractive index material particles 17 in the refractive index adjusting section 13b is preferably in the range of 1.7 to 2.7.
- the difference in refractive index between the high refractive index material particles and the pressure sensitive adhesive base material is preferably 0.2 to 1.3.
- High refractive index materials that can be used in this embodiment of the invention include TiO 2 , ZrO 2 , CeO 2 , Al 2 O 3 , BaTiO 2 , Nb 2 O 5 and SnO 2 , selected from these groups
- the high refractive index material particles 17 can be formed using one or more compounds.
- the average primary particle diameter of the high refractive index material particles 17 may be 3 nm to 100 nm, and the particles are distributed in the refractive index adjustment section 13b in a dispersed state or in a partially aggregated state. .
- the boundary between the refractive index adjusting section 13b and the base adhesive section 13a has an irregular concavo-convex shape as described with reference to FIG. 1, but in measuring the thickness of the refractive index adjusting section 13b.
- the depth range in which 90% of the high refractive index material particles 17 exist is defined as the thickness measurement value of the section 13b at the measurement position, and the refractive index adjustment is performed by averaging the measurement values at a plurality of measurement positions It is set as the thickness of the section 13b for use.
- FIG. 3 illustrates a configuration in which a transparent conductive layer 7 such as a patterned ITO film is formed on the surface of the second optical member 4 on the pressure-sensitive adhesive layer side in order to configure a touch panel sensor. It is sectional drawing which shows embodiment to which the adhesive layer 13 to show is applied.
- the glass substrate of the display panel in a liquid crystal display device or an organic EL display device can be mentioned, for example.
- FIG. 4 is a plan view showing a state of the main surface 16 of the pressure-sensitive adhesive layer 13 in contact with the second optical member 4.
- a high-refractive-index material particle 17 is dispersed in an island shape in a matrix 18 of an adhesive base material, and has an island configuration, and the adhesive layer 13 contacts the second optical member 4.
- the area ratio between the high refractive index material particles 17 and the adhesive base material at this position is preferably in the range of 30 to 99%.
- the area ratio should be the ratio of the area occupied by the high refractive index material particles 17 to the total area of the square region in a square region with a side of 10 ⁇ m to 200 ⁇ m, and measurement is performed for a plurality of rectangular regions, and the measured values are averaged. Thus, the area ratio is obtained.
- FIGS. 5 (a), 5 (b), and 5 (c) are diagrams schematically showing a process of manufacturing the pressure-sensitive adhesive layer 13 shown in FIG.
- a dispersion 19 in which the above-described high refractive index material particles 17 are dispersed in a solvent and a layer 20 of an adhesive base material are prepared.
- the dispersion 19 is applied to the surface of the pressure-sensitive adhesive base material layer 20.
- the surface of the pressure-sensitive adhesive base material layer 20 is swollen by the solvent of the dispersion liquid 19, and the high refractive index material particles 17 in the dispersion liquid 19 penetrate into the pressure-sensitive adhesive base material layer 20 in the thickness direction in the process.
- FIG. Thereafter, the pressure-sensitive adhesive base material layer 20 is dried by a drying step, whereby the solvent of the dispersion liquid 19 is evaporated and the pressure-sensitive adhesive layer 13 shown in FIG. 2 can be obtained.
- the penetration depth of the high refractive index material particles 17 into the adhesive base material layer 20 is determined by the relationship between the adhesive base material and the solvent of the dispersion liquid 19.
- the solvent can be appropriately selected so that the penetration depth becomes the value described above.
- Adhesive base production ⁇ Preparation of adhesive A> (Acrylic oligomer) 60 parts by weight of dicyclopentanyl acrylate (DCPMA, dicyclopentanyl methacrylate), 40 parts by weight of methyl methacrylate (MMA, methyl methacrylate), 3.5 parts by weight of ⁇ -thioglycerol as a chain transfer agent, and a polymerization solvent 100 parts by weight of toluene was put into a four-necked flask, and these were stirred at 70 ° C. for 1 hour in a nitrogen atmosphere.
- DCPMA dicyclopentanyl acrylate
- MMA methyl methacrylate
- ⁇ -thioglycerol a polymerization solvent
- the acrylic polymer thus obtained was designated as “acrylic polymer (A-1)”.
- the acrylic polymer (A-1) had a weight average molecular weight (Mw) of 5.1 ⁇ 10 3 .
- Adhesive A A monomer mixture composed of 68 parts by weight of 2-ethylhexyl acrylate (2EHA), 14.5 parts by weight of N-vinyl-2-pyrrolidone (NVP), and 17.5 parts by weight of 2-hydroxyethyl acrylate (HEA) , 0.035 parts by weight of a photopolymerization initiator (trade name “Irgacure 184”, manufactured by BASF) and 0.035 parts by weight of a photopolymerization initiator (trade name “Irgacure 651”, manufactured by BASF) Ultraviolet rays were irradiated until the viscosity (measurement condition: BH viscometer No. 5 rotor, 10 rpm, measurement temperature 30 ° C.) reached about 20 Pa ⁇ s to obtain a prepolymer composition in which a part of the monomer component was polymerized. .
- the acrylic polymer (B-1), 0.15 parts by weight of hexanediol diacrylate (HDDA), a silane coupling agent (trade name “KBM-403”, Shin-Etsu) are added to the prepolymer composition.
- Chemical Co., Ltd. 0.3 parts by weight was added and mixed to obtain an acrylic pressure-sensitive adhesive composition.
- the acrylic pressure-sensitive adhesive composition is applied on the release-treated surface of a release film (trade name “MRF # 38”, manufactured by Mitsubishi Plastics Co., Ltd.) so that the thickness after forming the pressure-sensitive adhesive layer is 150 ⁇ m.
- an adhesive composition layer was formed, and then a release film (trade name “MRN # 38”, manufactured by Mitsubishi Plastics, Inc.) was bonded to the surface of the adhesive composition layer. Thereafter, ultraviolet irradiation was performed under the conditions of illuminance: 5 mW / cm 2 and light amount: 1500 mJ / cm 2 to photocure the pressure-sensitive adhesive composition layer to form a pressure-sensitive adhesive layer.
- a release film trade name “MRN # 38”, manufactured by Mitsubishi Plastics, Inc.
- this monomer mixture was partially photopolymerized by exposing it to ultraviolet rays under a nitrogen atmosphere to obtain a partially polymerized product (acrylic polymer syrup) having a polymerization rate of about 10% by weight.
- acrylic polymer syrup acrylic polymer syrup
- TMPTA trimethylolpropane triacrylate
- silane coupling agent trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.
- the final thickness of the monomer component prepared as described above is applied to the release-treated surface of a 38 ⁇ m-thick polyester film (trade name: Diafoil MRF, manufactured by Mitsubishi Resin Co., Ltd.) whose one side is peel-treated with silicone.
- a coating layer was formed by coating to a thickness of 100 ⁇ m.
- a 38 ⁇ m thick polyester film (trade name: Diafoil MRE, manufactured by Mitsubishi Resin Co., Ltd.) having one surface peeled with silicone on the surface of the applied monomer component, the peel-treated surface of the film is on the coating layer side It coat
- the sheet having the coating layer thus obtained was irradiated with ultraviolet rays having an illuminance of 5 mW / cm 2 (measured with Topcon UVR-T1 having a maximum sensitivity of about 350 nm) using a chemical light lamp (manufactured by Toshiba Corporation). Irradiated for 2 seconds to cure the coating layer to form a pressure-sensitive adhesive layer, and a pressure-sensitive adhesive sheet (baseless type, pressure-sensitive adhesive layer thickness: 100 ⁇ m) having release sheets provided on both sides of the pressure-sensitive adhesive layer was produced.
- Treatment liquid for coating (dispersion medium) containing zirconia particles (ZrO 2 , refractive index: 2.17, average primary particle size: 20 nm) as a dispersion containing high refractive index particles on the surface of the exposed pressure-sensitive adhesive layer : Ethanol, particle concentration: 1.5% by weight, dispersion transmittance: 75%, manufactured by CIK Nanotech Co., Ltd.), bar coater RDS No. 5 and dried in a drying oven at 110 ° C. for 180 seconds.
- a PET release sheet was bonded to the surface of the pressure-sensitive adhesive layer in which zirconia (ZrO 2 ) particles were dispersed to obtain a pressure-sensitive adhesive sheet. In this way, the average primary particle diameter of the zirconia particles was measured by TEM observation.
- a pressure-sensitive adhesive sheet was similarly prepared using the following pressure-sensitive adhesive and nanoparticle dispersion liquid of a high refractive index material.
- the materials used are adhesive B (refractive index 1.48), adhesive C (refractive index 1.47), ZrO 2 nanoparticle dispersion (dispersion medium: ethanol, particle size 20 nm), ZrO 2 nanoparticle dispersion ( Dispersion medium: ethanol, particle diameter 30 nm), and ZrO 2 nanoparticle dispersion liquid (dispersion medium: n-propanol, particle diameter 20 nm).
- One light release of the pressure-sensitive adhesive A (the refractive index of the pressure-sensitive adhesive layer: 1.49) in a state where the thickness of the pressure-sensitive adhesive layer is 150 ⁇ m and both surfaces of the pressure-sensitive adhesive layer are protected by a light release PET release sheet The PET release sheet was peeled off.
- a styrene oligomer solution (refractive index: 1.60, manufactured by Yasuhara Chemical Co., Ltd., SX-100) dispersed in toluene so as to have a solid content concentration of 2% by weight on the surface of the exposed pressure-sensitive adhesive layer was added to the refractive index adjusting layer.
- Bar coater RDS No. is adjusted so that the thickness is 20 nm to 300 nm. 5 and dried in a drying oven at 110 ° C. for 180 seconds. Next, a PET release sheet was bonded to the surface of the pressure-sensitive adhesive layer on which styrene was arranged to obtain a pressure-sensitive adhesive sheet.
- FIGS. 9 (a) and 9 (b) A cross section in the vicinity of the surface having the high refractive index material particles of the pressure-sensitive adhesive layer of the example was observed at a magnification of 30,000 using a transmission electron microscope (TEM). The results are shown in FIGS. 9 (a) and 9 (b).
- FIG. 9A the high refractive index material particles are distributed almost uniformly over almost the entire thickness of the refractive index adjusting section.
- FIG. 9B the high refractive index material in the pressure-sensitive adhesive layer is used. It can be seen that the particle distribution is highest on the surface of the pressure-sensitive adhesive layer and has a distribution that decreases in the thickness direction of the pressure-sensitive adhesive layer.
- ⁇ Average surface refractive index> The average surface refractive index of the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples was measured for the refractive index at sodium D line (589 nm) using a spectroscopic ellipsometer (EC-400, manufactured by JA Woollam).
- the average refractive index of the surface on which the particles were applied was measured in a state where the release sheets on both sides were peeled off and the blackboard was bonded to the surface on which the particles were not applied.
- the average refractive index of the pressure-sensitive adhesive layer surface was measured in a state where both the release sheets were peeled off and a blackboard was bonded to one surface.
- ⁇ Measurement of thickness of refractive index adjustment layer> The cross section in the depth direction of the pressure-sensitive adhesive layer was adjusted, and TEM observation was performed. The thickness of the refractive index adjusting layer was measured from the obtained TEM image (direct magnification: 3000 to 30000 times). The thickness of the refractive index adjustment layer is the average value of the unevenness of the interface between the adhesive base layer and the adjustment layer. If it is difficult to distinguish the interface with the adhesive base layer, the surface TEM image is converted into image processing software ( ImageJ) was subjected to binary image processing, and the depth of the region where 90% of the nanoparticles were present was defined as the thickness of the adjustment layer.
- ImageJ image processing software
- ⁇ Area ratio of high refractive index particles The surface of the pressure-sensitive adhesive layer on the particle application side was observed using an FE-SEM at an acceleration voltage of 2 kV, an observation magnification of 500 times, 2,000 times, and 5,000 times.
- image processing software image processing software
- the other release sheet is peeled off and pressure-bonded to a glass plate as a test plate (trade name: soda lime glass # 0050, manufactured by Matsunami Glass Industry Co., Ltd.) under a 2 kg roller, one reciprocating pressure condition.
- a test plate trade name: soda lime glass # 0050, manufactured by Matsunami Glass Industry Co., Ltd.
- a sample composed of a test plate / adhesive layer / PET film was prepared.
- the obtained sample was autoclaved (50 ° C., 0.5 MPa, 15 minutes), and then 23 ° C., 50% R.D. H. And allowed to cool for 30 minutes.
- a tensile tester device name: Autograph AG-IS, manufactured by Shimadzu Corporation
- JIS Z0237 23 ° C., 50% R.D. H.
- the pressure-sensitive adhesive sheet pressure-sensitive adhesive layer / PET film
- a pressure-sensitive adhesive sheet not coated with high refractive index particles was prepared, and a 180-degree peel adhesive force was measured in the same manner as above for the pressure-sensitive adhesive sheet not coated with high refractive index particles (base). The ratio (%) of the 180-degree peel adhesive strength of each sample to the adhesive strength of the pressure-sensitive adhesive layer) and the adhesive strength of the base pressure-sensitive adhesive layer was calculated.
- ⁇ Transmissivity of dispersion containing high refractive index particles The transmittance of the dispersion containing the high refractive index particles was measured with a photoelectric colorimeter (AC-114, manufactured by OPTIMA) using a 530 nm filter. The transmittance (%) of the dispersion used in each Example and Comparative Example was measured with the transmittance of the dispersion solvent alone being 100%.
- One surface of the optical member laminates of Examples and Comparative Examples is used as a reflectance measurement surface, and a black PET base material-attached tape (PET75NBPET38 manufactured by Lintec Co., Ltd.) is pasted on the opposite surface and a sample for reflectance measurement did.
- the reflectance (Y value) on the reflectance measurement surface side of the optical member laminate was measured with a reflective spectrophotometer (U4100, manufactured by Hitachi High-Technologies Corporation). The measurement was performed at both positions where the transparent conductive layer was etched and where the transparent conductive layer was not etched.
- the measurement of the etched portion (opening) of the transparent conductive layer is the reflectivity of the interface between the refractive index adjustment layer of the pressure-sensitive adhesive layer and the refractive index adjustment layer of the optical member laminate, and the portion not etched (
- the measurement of (pattern part) shows the reflectance of the refractive index adjustment layer and transparent conductive layer interface of an adhesive layer.
- the reflection suppression rate was calculated based on the following formula for each of the etched part and the non-etched part.
- “reflectance when there is no particle (%)” is the reflectance of the optical member laminate of the comparative example (when no particle is used). That is, the reflection suppression rate is an index indicating how much the reflectance can be reduced by having the refractive index adjustment layer.
- Reflection suppression rate (%) Reflectivity (%)-Reflectance without particles (%)
- a film having an anti-blocking layer on both sides was formed by irradiating ultraviolet rays (high pressure mercury lamp) each having an accumulated light amount of 300 mJ (hereinafter referred to as COP base material).
- a refractive index adjusting agent (trade name: “OPSTAR KZ6661”, manufactured by JSR Co., Ltd.) is applied to one side of the COP substrate with a bar coater, dried in an oven at 80 ° C. for 1 minute, A 300 mJ ultraviolet ray (high pressure mercury lamp) was irradiated to form a refractive index adjusting layer having a thickness of 100 nm and a refractive index of 1.65.
- ITO indium tin oxide layer
- ⁇ Preparation of transparent conductive layer using PET as substrate> A plurality of particles having a diameter of 3 ⁇ m (trade name: “SSX105”, manufactured by Sekisui Resin Co., Ltd.) are bonded to one side of a 50 ⁇ m thick PET film (trade name: “Lumirror: U40” manufactured by Toray Industries, Inc.). : “Unidic RS29-120” (manufactured by DIC) 100 parts of coating solution was applied using a bar coater, dried in an oven at 80 ° C. for 1 minute, An anti-blocking layer having a film thickness of 1.5 ⁇ m was formed on one side by irradiating 300 mJ ultraviolet rays (high pressure mercury lamp).
- the hard coat resin (trade name: “OPSTAR KZ7540 (silica nanoparticle-containing)”, manufactured by JSR Corporation) is adjusted to a solid content of 10% with MIBK on the opposite side to the previously coated surface.
- the coated liquid is applied using a bar coater, dried in an oven at 80 ° C. for 1 minute, and then irradiated with ultraviolet light (high-pressure mercury lamp) with an integrated light quantity of 300 mJ to form a hard coat layer with a thickness of 1.5 ⁇ m.
- the film which has it was formed (henceforth PET base material).
- a refractive index adjusting agent (trade name: “OPSTAR H0001 (containing zirconia nanoparticles)”, manufactured by JSR Co., Ltd.) is made to have a solid content of 10% with MIBK.
- the prepared coating solution is applied using a bar coater, dried in an oven at 80 ° C. for 1 minute, and then irradiated with ultraviolet light (high pressure mercury lamp) with an integrated light amount of 300 mJ to have a film thickness of 35 nm and a refractive index of 1.63.
- the refractive index adjustment layer 2 was formed.
- a refractive index adjusting agent (trade name: “L-005 (containing hollow nanosilica particles)”, manufactured by JSR Co., Ltd.) is solidified to 1.5% with MIBK.
- the coating liquid prepared as described above was applied using a bar coater, dried in an oven at 80 ° C. for 1 minute, and then irradiated with ultraviolet light (high-pressure mercury lamp) with an integrated light quantity of 300 mJ, with a film thickness of 40 nm and a refractive index.
- a refractive index adjusting layer 1 of 1.49 was formed.
- the PET base material having the refractive index adjusting layers 1 and 2 is put into a take-up type sputtering apparatus, and an indium tin oxide layer (ITO) having a thickness of 23 nm is formed on the surface of the refractive index adjusting layer 1 as a transparent conductive layer. Laminated.
- ITO indium tin oxide layer
- the pressure-sensitive adhesive sheet was laminated so that the transparent conductive layer was in contact with the transparent conductive layer.
- a glass slide or a 100 ⁇ m thick cycloolefin polymer film (trade name: “Zeonor ZF16”, in-plane birefringence: 0 for surface protection and optical measurement .0001, manufactured by Nippon Zeon Co., Ltd.).
- FIG. 6A A laminated body 21 shown in FIG. 6A has a refractive index adjustment layer 23 having a refractive index of 1.65 formed on one surface of a COP base material 22 having a refractive index of 1.53.
- a patterned ITO layer 24 is formed.
- the refractive index of ITO was 1.9.
- This laminate 21 is referred to as “second optical member with ITO (1)”.
- a laminated body 31 shown in FIG. 6B has a refractive index adjustment layer 33 having a refractive index of 1.63 formed on one surface of a PET base material 32 having a refractive index of 1.57. Further, another refractive index adjustment layer 33a having a refractive index of 1.49 is formed, and a patterned ITO layer 34 is formed on the refractive index adjustment layer 33a. Even in this case, the refractive index of ITO was 1.9.
- This laminate 31 is referred to as “second optical member with ITO (2)”.
- the laminated body 41 of the second optical member with ITO (3) has a configuration in which an ITO layer 44 that is not patterned is formed on a glass substrate 42 having a refractive index of 1.53.
- Example 1 As shown to Fig.7 (a), the 2nd optical member (1) with ITO was joined to the glass window 26 which comprises the 1st optical member 2 via the adhesive layer 25 by one Embodiment of this invention.
- the refractive index of the glass window 26 was 1.53.
- the pressure-sensitive adhesive layer 25 has a base pressure-sensitive adhesive section 25a formed of the pressure-sensitive adhesive A and having a refractive index of 1.49, and a refractive index adjusting section 25b having a refractive index of 1.68.
- the refractive index adjusting section 25b is a dispersion of 1.5 wt% zirconium oxide particles, in which zirconium oxide particles having an average particle diameter of 20 nm are dispersed in an ethanol solution, is applied to the surface of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive A. It is obtained by allowing zirconium oxide particles to permeate in the thickness direction from one surface of the pressure-sensitive adhesive layer and drying.
- the thickness of the pressure-sensitive adhesive layer 25 was 150 ⁇ m
- the thickness of the refractive index adjusting section 25b was 150 nm.
- a surface photograph of the refractive index adjustment section 25b in Example 1 is shown in FIG. 8, and a cross-sectional photograph is shown in FIG. 9A.
- a black PET film 27 was pasted on the back surface, which is the surface opposite to the refractive index adjustment layer 23 of the COP base material 22.
- the optical properties of the optical member laminate thus obtained were measured. The results are shown in Table 1.
- Example 2 As shown in FIG.7 (b), the 2nd optical member (2) with ITO was joined to the glass window 36 which comprises the 1st optical member 2 via the adhesive layer 35 by other embodiment of this invention. .
- the refractive index of the glass window 26 was 1.53.
- the pressure-sensitive adhesive layer 35 has a base pressure-sensitive adhesive section 35a formed of the pressure-sensitive adhesive B and having a refractive index of 1.48, and a refractive index adjusting section 35b having a refractive index of 1.62.
- the refractive index adjusting section 35b a dispersion of 2.0 wt% zirconium oxide particles in which zirconium oxide particles having an average particle diameter of 20 nm are dispersed in an n-propanol liquid is applied to the surface of the adhesive layer made of the adhesive B.
- the zirconium oxide particles were obtained by infiltrating in the thickness direction from one surface of the pressure-sensitive adhesive layer and drying.
- the thickness of the pressure-sensitive adhesive layer 35 was 100 ⁇ m
- the thickness of the refractive index adjusting section 35b was 500 nm.
- a cross-sectional photograph of the refractive index adjusting section 35b in Example 2 is shown in FIG.
- a black PET film 37 was pasted on the back surface, which is the surface opposite to the refractive index adjustment layer 33 of the PET base material 32.
- the optical properties of the optical member laminate thus obtained were measured. The results are shown in Table 1.
- the 2nd optical member (3) with ITO was joined to the window 46 which comprises the 1st optical member 2 via the adhesive layer 45 by further another embodiment of this invention.
- the window 46 is a transparent member having a refractive index of 1.53 manufactured by ZEONOR film (ZF14-100, registered trademark).
- the pressure-sensitive adhesive layer 45 had a base pressure-sensitive adhesive section 45a having a refractive index of 1.46 and a refractive index adjustment section 45b having a refractive index of 1.70, formed of the pressure-sensitive adhesive C.
- the refractive index adjusting section 45b is obtained by applying a dispersion of zirconium oxide particles 1.5 wt%, in which zirconium oxide particles having an average particle diameter of 30 nm are dispersed in an ethanol liquid, to the surface of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive C. It is obtained by allowing zirconium oxide particles to permeate in the thickness direction from one surface of the pressure-sensitive adhesive layer and drying.
- the thickness of the pressure-sensitive adhesive layer 45 was 25 ⁇ m, and the thickness of the refractive index adjusting section 45b was 200 nm.
- a black PET film 47 was pasted on the back surface of the glass substrate 42 opposite to the ITO layer 44. The optical properties of the optical member laminate thus obtained were measured. The results are shown in Table 1.
- Example 4 Using an adhesive layer having a configuration different from that of Example 1, an optical member laminate similar to that shown in FIG. In this example, the second optical member with ITO (1) was joined to the glass window 26 constituting the first optical member 2 via the adhesive layer 25 according to still another embodiment of the present invention.
- the refractive index of the glass window 26 was 1.53.
- the pressure-sensitive adhesive layer 25 has a base pressure-sensitive adhesive section 25a formed of the pressure-sensitive adhesive A and having a refractive index of 1.49, and a refractive index adjusting section 25b having a refractive index of 1.65.
- the refractive index adjusting section 25b a 0.5 wt% dispersion of titanium oxide particles in which titanium oxide particles having an average particle diameter of 20 nm are dispersed in an n-butanol solution is applied to the surface of the adhesive layer made of the adhesive A.
- the titanium oxide particles were obtained by infiltrating in the thickness direction from one surface of the pressure-sensitive adhesive layer and drying.
- the thickness of the pressure-sensitive adhesive layer 25 was 150 ⁇ m
- the thickness of the refractive index adjusting section 25b was 130 nm.
- a black PET film 27 was pasted on the back surface, which is the surface opposite to the refractive index adjustment layer 23 of the COP base material 22. The optical properties of the optical member laminate thus obtained were measured. The results are shown in Table 1.
- Example 5 By forming a refractive index adjustment section using a styrene oligomer having a refractive index of 1.60, an optical member laminate similar to that shown in FIG. In this example, the second optical member with ITO (1) was joined to the glass window 26 constituting the first optical member 2 via the adhesive layer 25 according to still another embodiment of the present invention.
- the refractive index of the glass window 26 was 1.53.
- the pressure-sensitive adhesive layer 25 had a base pressure-sensitive adhesive section 25a formed of the pressure-sensitive adhesive A and having a refractive index of 1.49, and a refractive index adjusting section 25b having a refractive index of 1.55.
- the refractive index adjusting section 25b a 2 wt% solid dispersion in which a styrene oligomer having a refractive index of 1.60 as a solid content is dispersed in a toluene liquid is applied to the surface of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive A to obtain a solid It was obtained by allowing the minute portion to permeate in the thickness direction from one surface of the pressure-sensitive adhesive layer and drying.
- the thickness of the pressure-sensitive adhesive layer 25 was 150 ⁇ m
- the thickness of the refractive index adjusting section 25b was 300 nm.
- a black PET film 27 was pasted on the back surface, which is the surface opposite to the refractive index adjustment layer 23 of the COP base material 22. The optical properties of the optical member laminate thus obtained were measured. The results are shown in Table 1.
- the refractive index is higher than the refractive index of the pressure-sensitive adhesive base material in the thickness direction from the surface on the second optical member side. Since the refractive index adjustment section having the refractive index is provided, it is possible to prevent the internally reflected light of the outside light from returning through the first optical member.
- the present invention can be applied to optical display devices such as liquid crystal display devices and organic EL display devices.
- the present invention can be advantageously applied particularly to a touch panel display device having a touch sensor.
Abstract
Description
〈粘着剤Aの作製〉
(アクリルオリゴマー)
ジシクロペンタニルアクリレート(DCPMA、メタクリル酸ジシクロペンタニル)60重量部、メチルメタクリレート(MMA、メタクリル酸メチル)40重量部、連鎖移動剤としてのα-チオグリセロール3.5重量部、及び重合溶媒としてのトルエン100重量部を、4つ口フラスコに投入し、これらを窒素雰囲気下において70℃で1時間撹拌した。次に、重合開始剤としての2,2´-アゾビスイソブチロニトリル0.2重量部を4つ口フラスコに投入し、70℃で2時間反応させ、続いて、80℃で2時間反応させた。その後、反応液を130℃温度雰囲気下に投入し、トルエン、連鎖移動剤及び未反応モノマーを乾燥除去させ、固形状のアクリル系ポリマーを得た。このようにして得られたアクリル系ポリマーを「アクリル系ポリマー(A-1)」とした。このアクリル系ポリマー(A-1)の重量平均分子量(Mw)は5.1×103であった。
アクリル酸2-エチルヘキシル(2EHA)68重量部、N-ビニル-2-ピロリドン(NVP)14.5重量部、及びアクリル酸2-ヒドロキシエチル(HEA)17.5重量部から構成されるモノマー混合物に、光重合開始剤(商品名「イルガキュア184」、BASF社製)0.035重量部、及び光重合開始剤(商品名「イルガキュア651」、BASF社製)0.035重量部を配合した後、粘度(計測条件:BH粘度計No.5ローター、10rpm、測定温度30℃)が約20Pa・sになるまで紫外線を照射して、上記モノマー成分の一部が重合したプレポリマー組成物を得た。
2-エチルヘキシルアクリレート(2EHA)32重量部、イソステアリルアクリレート(ISTA)48重量部、2-ヒドロキシプロピルアクリレート(2HPA)20重量部、2種の光重合開始剤(商品名:イルガキュア184、BASF製)0.05重量部、及び光重合開始剤(商品名:イルガキュア651、BASF製)0.05重量部を、4つ口フラスコに投入してモノマー混合物を調製した。次いで、このモノマー混合物を窒素雰囲気下で紫外線に曝露して部分的に光重合させることにより、重合率約10重量%の部分重合物(アクリル系ポリマーシロップ)を得た。このようにして得られたアクリル系ポリマーシロップの100重量部に、トリメチロールプロパントリアクリレート(TMPTA)0.02重量部、シランカップリング剤(商品名:KBM-403、信越化学工業(株)製)を0.3部添加した後、これらを均一に混合してモノマー成分を調製した。
温度計、攪拌機、還流冷却管及び窒素ガス導入管を備えたセパラブルフラスコに、モノマー成分として、ブチルアクリレート(BA)99部、4ヒドロキシブチルアクリレート(4HBA1部、重合開始剤としてアゾビスイソブチロニトリル0.2部及び重合溶媒として酢酸エチルを固形分が30%になるように投入した後、窒素ガスを流し、攪拌しながら約1時間窒素置換を行った。その後60℃にフラスコを加熱し、7時間反応させて重量平均分子量(Mw)110万のアクリル系ポリマーを得た。このアクリル系ポリマーの溶液(固形分100部)に、イソシアネート系架橋剤としてトリメチロールプロパンキシリレンジイソシアネート(三井化学(株)製「タケネートD110N」)0.1部、シランカップリング剤(信越化学(株)製「KBM-403」)0.1部を加えて粘着剤組成物(溶液)を調製した。このようにして調製した粘着剤溶液を、剥離シートの離型処理面に乾燥後の厚さが25μmとなるように塗布し、常圧下、60℃で1分間及び150℃で1分間加熱乾燥し、さらに23℃で120時間エージングを行って粘着剤層を作成した。
〈粘着剤A/高屈折率材料のナノ粒子分散液を使用する事例〉
(粘着剤A/ナノ粒子分散液(分散媒:エタノール)を使用した事例)
粘着剤層の厚さが150μmであって、該粘着剤層の両面が軽剥離PET剥離シートで保護されている状態の粘着剤A(粘着剤層の屈折率:1.49)の一方の軽剥離PET剥離シートを剥離した。露出した粘着剤層の表面に、高屈折率粒子を含有する分散液としてのジルコニア粒子(ZrO2、屈折率:2.17、平均一次粒子径:20nm)を含有する塗布用処理液(分散媒:エタノール、粒子濃度:1.5重量%、分散液の透過率:75%、CIKナノテック(株)製)を、屈折率調整区分の厚さが20nm~300nmになるようにバーコーターRDS No.5で塗布し、110℃の乾燥オーブンで180秒間乾燥させた。次いで、ジルコニア(ZrO2)粒子が分散された粘着剤層表面に、PET剥離シートを貼り合わせ、粘着剤シートを得た。なお、このようにしてジルコニア粒子の平均一次粒子径を、TEM観察により計測した。
上記の事例と同様にして、下記の粘着剤及び高屈折率材料のナノ粒子分散液を使用して、同様に粘着剤シートを作製した。使用材料は、粘着剤B(屈折率1.48)、粘着剤C(屈折率1.47)、ZrO2ナノ粒子分散液(分散媒:エタノール、粒径20nm)、ZrO2ナノ粒子分散液(分散媒:エタノール、粒径30nm)、及びZrO2ナノ粒子分散液(分散媒:n-プロパノール、粒径20nm)であった。
粘着剤層の厚さが150μmであって、該粘着剤層の両面が軽剥離PET剥離シートで保護された状態の粘着剤A(粘着剤層の屈折率:1.49)の一方の軽剥離PET剥離シートを剥離した。露出した粘着剤層の表面に、予め固形分濃度2重量%となるようにトルエンに分散したスチレンオリゴマー溶液(屈折率:1.60、ヤスハラケミカル社製、SX-100)を、屈折率調整層の厚さが20nm~300nmになるようにバーコーターRDS No.5で塗布し、110℃の乾燥オーブンで180秒間乾燥させた。次いで、スチレンを配置した粘着剤層表面に、PET剥離シートを貼り合わせ、粘着剤シートを得た。
<粘着剤層の表面状態の観察>
実施例のそれぞれにおける粘着剤層の高屈折率材料粒子を有する側の表面を、FE-SEMを用いて、加速電圧2kV、観察倍率500倍、2,000倍、5,000倍、及び20,000倍で観察した。図8にその20,000倍写真を示す。高屈折率材料粒子が均一に分散されていることが分かる。
実施例の粘着剤層の高屈折率材料粒子を有する側の表面近傍の断面を、透過型電子顕微鏡(TEM)を用いて、倍率30,000倍で観察した。その結果を図9(a)(b)に示す。図9(a)では、屈折率調整用区分の厚みのほぼ全体にわたって高屈折率材料粒子がほぼ均一に分布しているが、図9(b)の例では、粘着剤層における高屈折率材料粒子の分布が、粘着剤層の表面で最も高く、粘着剤層の厚さ方向に従って減少していく分布を有することが分かる。
実施例及び比較例で得られた粘着シートの平均表面屈折率を、分光エリプソメーター(EC-400、JA.Woolam製)を用いてナトリウムD線(589nm)における屈折率を測定した。実施例及び比較例の粘着シートでは、両面の剥離シートを剥離して、粒子を塗布していない面に黒板を貼り合わせた状態で、粒子が塗布されている面の平均屈折率を測定した。比較例の粘着シートでは、両方の剥離シートを剥離して、一方の面に黒板を貼り合わせた状態で、粘着剤層表面の平均屈折率を測定した。
粘着剤層の深さ方向の断面を調整し、TEM観察を行った。得られたTEM像(直接倍率3000~30000倍)から屈折率調整層の厚さの測定を計測した。屈折率調整層の厚みは、粘着剤ベース層との調整層との界面の凸凹の平均値とし、粘着剤ベース層との界面の判別が困難な場合には、表面TEM像を画像処理ソフト(ImageJ)で二値化画像処理し、ナノ粒子の90%が存在する領域の深さを調整層の厚みとした。
粘着剤層の粒子塗布側の表面を、FE-SEMを用いて、加速電圧2kV、観察倍率500倍、2,000倍、5,000倍で観察した。得られた表面SEM像を画像処理ソフト(ImageJ)で二値化画像処理することで、長辺23μm、短辺18μmの長方形領域における全体面積に対する面積として高屈折率粒子の占める面積比率(%)を求めた。
実施例及び比較例で得られた粘着シートでは、粒子塗布側の剥離シートを剥離して、スライドガラス(商品名:白研磨 No.1、厚さ:0.8~1.0mm、全光線透過率:92%、ヘイズ:0.2%、松浪硝子工業(株)製)に貼り合わせた。さらに他方の剥離シートを剥離して、粘着剤層/スライドガラスの層構成を有する試験片を作製した。また、比較例の粘着シートでは、一方の剥離シートを剥離して、スライドガラス(商品名:白研磨 No.1、厚さ:0.8~1.0mm、全光線透過率:92%、ヘイズ:0.2%、松浪硝子工業(株)製)に貼り合わせ、さらに他方の剥離シートを剥離して、粘着剤層/スライドガラスの層構成を有する試験片を作製した。上記試験片の可視光領域における全光線透過率、ヘイズ値を、ヘイズメーター(装置名:HM-150、(株)村上色彩研究所製)を用いて測定した。
実施例及び比較例で得られた粘着シートから、長さ100mm、幅20mmのシート片を切り出した。次いで、実施例及び比較例のシート片では、粒子が塗布されていない側の剥離シートを剥離して、PETフィルム(商品名:ルミラー S-10、厚さ:25μm、東レ(株)製)を貼付(裏打ち)した。また、比較例1、2のシート片では、一方の剥離シートを剥離して、PETフィルム(商品名:ルミラー S-10、厚さ:25μm、東レ(株)製)を貼付(裏打ち)した。次に、他方の剥離シートを剥離して、試験板としてのガラス板(商品名:ソーダライムガラス ♯0050、松浪硝子工業(株)製)に、2kgローラー、1往復の圧着条件で圧着し、試験板/粘着剤層/PETフィルムから構成されるサンプルを作製した。
高屈折率粒子を含有する分散液の透過率は、光電比色計(AC-114、OPTIMA社製)で530nmのフィルターを用いて測定した。分散溶媒単独の透過率を100%として、各実施例、比較例で使用した分散液の透過率(%)を測定した。
実施例及び比較例の光学部材積層体の一方の面を反射率測定面とし、反対側の面に黒PET基材付テープ(リンテック(株)製 PET75NBPET38)を貼って反射率測定用の試料とした。光学部材積層体の反射率測定面側の反射率(Y値)を反射型分光光度計(U4100、(株)日立ハイテクノロジーズ製)により測定した。測定は、透明導電層をエッチングした部分と、エッチングしていない部分の双方の位置で行った。すなわち、透明導電層をエッチングした部分(開口部)の測定は、粘着剤層の屈折率調整層と光学部材積層体の屈折率調整層との界面の反射率であり、エッチングしていない部分(パターン部)の測定は、粘着剤層の屈折率調整層と透明導電層界面の反射率を示す。
反射抑制率(%)=反射率(%)-粒子がない場合の反射率(%)
<基材としてゼオノア(COP)を使用する透明導電層の作製>
厚さ100μmのシクロオレフィンポリマーフィルム(商品名:「ゼオノアZF16」、面内複屈折率:0.0001、日本ゼオン(株)製)の両面に、直径3μmの複数の粒子(商品名:「SSX105」、積水樹脂(株)製)を、バインダー樹脂(商品名:「ユニディックRS29-120」、DIC社製)100部に対して0.07部添加した塗工液をバーコーターを用いて塗布し、80℃のオーブン下で1分間乾燥後、積算光量各300mJの紫外線(高圧水銀灯)を照射することで両面にアンチブロッキング層を有するフィルムを形成した(以下、COP基材)。次に、COP基材の片面に、屈折率調整剤(商品名:「オプスター KZ6661」、JSR(株)製)をバーコーターにより塗布し、80℃のオーブン下で1分間乾燥後、積算光量各300mJの紫外線(高圧水銀灯)を照射することで、厚さ100nm、屈折率1.65の屈折率調整層を形成した。得られたCOP基材の屈折率調整層の表面に、巻き取り式スパッタ装置において、透明導電層として厚さ23nmのインジウムスズ酸化物層(ITO)を積層した。
厚さ50μmのPETフィルム(商品名:「ルミラー:U40」東レ社製)の片面に直径3μmの複数の粒子(商品名:「SSX105」、積水樹脂(株)製)を、バインダー樹脂(商品名:「ユニディックRS29-120」、DIC社製)100部に対して0.1部添加した塗工液を、バーコーターを用いて塗布し、80℃のオーブン下1分間乾燥後、積算光量各300mJの紫外線(高圧水銀灯)を照射することで片面に膜厚1.5μmのアンチブロッキング層を形成した。次に、先ほど塗工した面とは逆面に、ハードコート用樹脂(商品名:「オプスター KZ7540(シリカナノ粒子含有)」、JSR(株)製)をMIBKで固形分10%になるように調整した塗工液を、バーコーターを用いて塗工し、80℃のオーブン下で1分間乾燥後、積算光量300mJの紫外線(高圧水銀灯)を照射することで膜厚1.5μmのハードコート層を有するフィルムを形成した(以下、PET基材)。
次に、先ほど得られたハードコート層の上に、屈折率調整剤(商品名:「オプスター H0001(ジルコニアナノ粒子含有)」、JSR(株)製)をMIBKで固形分10%になるように調整した塗工液を、バーコーターを用いて塗工し、80℃のオーブン下で1分間乾燥後、積算光量300mJの紫外線(高圧水銀灯)を照射することで膜厚35nm、屈折率1.63の屈折率調整層2を形成した。次に、前述の屈折率調整層2の上に、屈折率調整剤(商品名:「L-005(中空ナノシリカ粒子含有)」、JSR(株)製)をMIBKで固形分1.5%になるように調整した塗工液を、バーコーターを用いて塗工し、80℃のオーブン下で1分間乾燥後、積算光量300mJの紫外線(高圧水銀灯)を照射することで膜厚40nm、屈折率1.49の屈折率調整層1を形成した。その後、屈折率調整層1、2を有するPET基材を、巻き取り式スパッタ装置に投入し、屈折率調整層1の表面に、透明導電層として厚み23nmのインジウムスズ酸化物層(ITO)を積層した。
無アルカリガラス(屈折率1.53)の一方の面に、スパッタリング法によりITO膜を形成し、非結晶化ITO膜(屈折率1.85)を有する透明導電性基材を作製した。この非結晶性ITO薄膜のSn比率は、3重量%であった。なお、ITO薄膜のSn比率は、Sn原子の重量/(Sn原子の重量+In原子の重量)から算出した。
上記透明導電層上の一部にフォトレジスト膜を形成した後、これを25℃、5重量%の塩酸(塩化水素水溶液)に1分間浸漬して、透明導電層のエッチングを行った。これにより電極配線パターンに相当する透明導電層が存在する部分(パターン部)と、除去された部分(開口部)とを作製した。上述した粘着剤シートの高屈折率材料粒子を有する側のPET剥離シートを剥離し、パターニングされた透明導電層の上に、該粘着剤シートの粘着剤層(前記高屈折率粒子を有する側)と該透明導電層とが接触するように、該粘着剤シートを積層した。粘着剤シートの反対側のPET剥離シートを剥離した後に、表面保護及び光学測定のためにスライドガラス又は厚さ100μmのシクロオレフィンポリマーフィルム(商品名:「ゼオノアZF16」、面内複屈折率:0.0001、日本ゼオン(株)製)を貼り合せた。
第2光学部材4として、図6(a)に示す積層体21と図6(b)に示す積層体31を準備した。図6(a)に示す積層体21は、屈折率1.53のCOP基材22の一表面上に屈折率1.65の屈折率調整層23が形成され、該屈折率調整層23の上に、パターン化されたITO層24が形成された構成である。ITOの屈折率は、1.9であった。この積層体21を「ITO付第2光学部材(1)」と呼ぶ。
図7(a)に示すように、ITO付第2光学部材(1)を、本発明の一実施形態による粘着剤層25を介して第1光学部材2を構成するガラスウインドウ26に接合した。ガラスウインドウ26の屈折率は1.53であった。粘着剤層25は、粘着剤Aにより形成された屈折率1.49のベース粘着剤区分25aと、屈折率1.68の屈折率調整用区分25bを有するものであった。屈折率調整用区分25bは、平均粒径20nmの酸化ジルコニウム粒子をエタノール液に分散させた、酸化ジルコニウム粒子1.5wt%の分散液を、粘着剤Aからなる粘着剤層の表面に塗布し、酸化ジルコニウム粒子を粘着剤層の一方の表面から厚み方向に浸透させ、乾燥させることによって得られたものである。粘着剤層25の厚みは150μmであり、屈折率調整用区分25bの厚みは150nmであった。この実施例1における屈折率調整用区分25bの表面写真を図8に、断面写真を図9(a)に、それぞれ示す。反射率測定のために、COP基材22の屈折率調整層23とは反対側の面である裏面には、黒色のPETフィルム27を貼った。このようにして得られた光学部材積層体の光学特性を測定した。結果を表1に示す。
図7(b)に示すように、ITO付第2光学部材(2)を、本発明の他の実施形態による粘着剤層35を介して第1光学部材2を構成するガラスウインドウ36に接合した。ガラスウインドウ26の屈折率は1.53であった。粘着剤層35は、粘着剤Bにより形成された屈折率1.48のベース粘着剤区分35aと、屈折率1.62の屈折率調整用区分35bを有するものであった。屈折率調整用区分35bは、平均粒径20nmの酸化ジルコニウム粒子をn‐プロパノール液に分散させた、酸化ジルコニウム粒子2.0wt%の分散液を、粘着剤Bからなる粘着剤層の表面に塗布し、酸化ジルコニウム粒子を粘着剤層の一方の表面から厚み方向に浸透させ、乾燥させることによって得られたものである。粘着剤層35の厚みは100μmであり、屈折率調整用区分35bの厚みは500nmであった。この実施例2においける屈折率調整用区分35bの断面写真を図9(b)に示す。反射率測定のために、PET基材32の屈折率調整層33とは反対側の面である裏面には、黒色のPETフィルム37を貼った。このようにして得られた光学部材積層体の光学特性を測定した。結果を表1に示す。
図7(c)に示すように、ITO付第2光学部材(3)を、本発明のさらに他の実施形態による粘着剤層45を介して第1光学部材2を構成するウインドウ46に接合した。ウインドウ46は、ゼオノアフィルム(ZF14-100、登録商標)により作製した、屈折率1.53の透明部材である。粘着剤層45は、粘着剤Cにより形成された屈折率1.46のベース粘着剤区分45aと、屈折率1.70の屈折率調整用区分45bを有するものであった。屈折率調整用区分45bは、平均粒径30nmの酸化ジルコニウム粒子をエタノール液に分散させた、酸化ジルコニウム粒子1.5wt%の分散液を、粘着剤Cからなる粘着剤層の表面に塗布し、酸化ジルコニウム粒子を粘着剤層の一方の表面から厚み方向に浸透させ、乾燥させることによって得られたものである。粘着剤層45の厚みは25μmであり、屈折率調整用区分45bの厚みは200nmであった。反射率測定のために、ガラス基板42のITO層44とは反対側の面である裏面には、黒色のPETフィルム47を貼った。このようにして得られた光学部材積層体の光学特性を測定した。結果を表1に示す。
実施例1とは異なる構成の粘着剤層を使用して、図7(a)に示すものと同様な光学部材積層体を作製した。この実施例においては、ITO付第2光学部材(1)を、本発明のさらに別の実施形態による粘着剤層25を介して第1光学部材2を構成するガラスウインドウ26に接合した。ガラスウインドウ26の屈折率は1.53であった。粘着剤層25は、粘着剤Aにより形成された屈折率1.49のベース粘着剤区分25aと、屈折率1.65の屈折率調整用区分25bを有するものであった。屈折率調整用区分25bは、平均粒径20nmの酸化チタン粒子をn‐ブタノール液に分散させた、酸化チタン粒子0.5wt%の分散液を、粘着剤Aからなる粘着剤層の表面に塗布し、酸化チタン粒子を粘着剤層の一方の表面から厚み方向に浸透させ、乾燥させることによって得られたものである。この実施例における粘着剤層25の厚みは150μmであり、屈折率調整用区分25bの厚みは130nmであった。反射率測定のために、COP基材22の屈折率調整層23とは反対側の面である裏面には、黒色のPETフィルム27を貼った。このようにして得られた光学部材積層体の光学特性を測定した。結果を表1に示す。
屈折率1.60のスチレンオリゴマーを使用して屈折率調整用区分を形成することにより、図7(a)に示すものと同様な光学部材積層体を作製した。この実施例においては、ITO付第2光学部材(1)を、本発明のさらに別の実施形態による粘着剤層25を介して第1光学部材2を構成するガラスウインドウ26に接合した。ガラスウインドウ26の屈折率は1.53であった。粘着剤層25は、粘着剤Aにより形成された屈折率1.49のベース粘着剤区分25aと、屈折率1.55の屈折率調整用区分25bを有するものであった。屈折率調整用区分25bは、固形分として屈折率1.60のスチレンオリゴマーをトルエン液に分散させた固形分2wt%の分散液を、粘着剤Aからなる粘着剤層の表面に塗布し、固形分を粘着剤層の一方の表面から厚み方向に浸透させ、乾燥させることによって得られたものである。この実施例における粘着剤層25の厚みは150μmであり、屈折率調整用区分25bの厚みは300nmであった。反射率測定のために、COP基材22の屈折率調整層23とは反対側の面である裏面には、黒色のPETフィルム27を貼った。このようにして得られた光学部材積層体の光学特性を測定した。結果を表1に示す。
ITO付第2光学部材(1)を、粘着剤Aのみからなる粘着剤層を介して第1光学部材2を構成する屈折率1.53のガラスウインドウ26に接合して、比較例1の光学部材積層体を作製した。
ITO付第2光学部材(2)を、粘着剤Bのみからなる粘着剤層を介して第1光学部材2を構成する屈折率1.53のガラスウインドウ26に接合して、比較例2の光学部材積層体を作製した。
2・・・第1光学部材
3,13・・・透明な粘着剤層
3a、13a・・・ベース粘着剤区分
3b、13b・・・屈折率調整用区分
4・・・第2光学部材
7・・・透明導電性層
17・・・高屈折率材料粒子
19・・・分散液
20・・・粘着剤ベース材料
21、31・・・積層体
22・・・COP基材
23・・・屈折率調整層
24・・・ITO層
25・・・粘着剤層
26・・・ガラスウインドウ
Claims (21)
- 透明な第1光学部材を第2光学部材に接合するための透明な粘着剤層を備える光学部材積層体であって、
前記粘着剤層は、前記第1光学部材に面する側の第1の主面から厚み方向にわたって透明な粘着剤ベース材料により本質的に形成されるベース粘着剤区分と、該粘着剤層の前記第2光学部材に面する側の第2の主面から厚み方向に形成された透明で粘着性の屈折率調整用区分とを含み、該屈折率調整用区分は、前記粘着剤ベース材料の屈折率より高い屈折率を有する
ことを特徴とする光学部材積層体。 - 請求項1に記載した光学部材積層体であって、前記屈折率調整用区分は、前記第2光学部材の屈折率より低い屈折率を有することを特徴とする光学部材積層体。
- 請求項1又は2に記載した光学部材積層体であって、前記第2光学部材には前記粘着剤層に面する側に所定パターンの透明導電性層が形成され、前記屈折率調整用区分は、該透明導電性層と前記第2光学部材との間の段差を埋めるように該透明導電性層と該第2光学部材の両方に接しており、前記屈折率調整用区分は、前記透明導電性層の屈折率より低い屈折率を有することを特徴とする光学部材積層体。
- 請求項3に記載した光学部材積層体であって、前記第2光学部材には、前記粘着剤層に面する側の表面に、前記透明導電性層の屈折率より低い屈折率を有する屈折率調整層が形成されており、前記粘着剤層の前記屈折率調整用区分は、前記第2光学部材の表面に形成された前記屈折率調整層の屈折率より高い屈折率を有することを特徴とする光学部材積層体。
- 請求項1から請求項4までのいずれか1項に記載した光学部材積層体であって、前記屈折率調整用区分は、厚みが20nm~600nmであることを特徴とする光学部材積層体。
- 請求項1から請求項5までのいずれか1項に記載した光学部材積層体であって、前記屈折率調整用区分は、前記粘着剤ベース材料と同じ粘着性材料に該粘着性材料より高い屈折率を有する高屈折率材料の粒子が分散されて該屈折率調整用区分の平均屈折率を高めるように構成されたことを特徴とする光学部材積層体。
- 請求項3に記載した光学部材積層体であって、前記屈折率調整用区分は、前記粘着剤ベース材料と同じ粘着性材料に該粘着性材料より高い屈折率を有する高屈折率材料の粒子が分散されて該屈折率調整用区分の平均屈折率を高めるように構成されたものであり、前記透明導電性層の屈折率は1.75~2.14であり、前記粘着剤ベース材料の屈折率は1.40~1.55であり、前記高屈折率材料の粒子の屈折率は1.60~2.74であることを特徴とする光学部材積層体。
- 請求項6又は請求項7に記載した光学部材積層体であって、前記屈折率調整用区分と前記第2光学部材との間の接合面には、前記高屈折材料の粒子が前記第2光学部材に接触する領域と、該屈折率調整用区分の粘着性材料が該第2光学部材に接触するマトリクス領域とが形成されることを特徴とする光学部材積層体。
- 請求項6から請求項8までのいずれか1項に記載した光学部材積層体であって、前記高屈折率材料は、TEM観察による平均一次粒子径が3nm~100nmであることを特徴とする光学部材積層体。
- 請求項6から請求項9までのいずれか1項に記載した光学部材積層体であって、前記高屈折率材料の粒子と前記粘着剤ベース材料の屈折率の差が0.2~1.3であることを特徴とする光学部材積層体。
- 請求項6から請求項10までのいずれか1項に記載した光学部材積層体であって、前記高屈折率材料は、TiO2、ZrO2、CeO2、Al2O3、BaTiO3、Nb2O5、及びSnO2からなる群から選択された1又は複数の化合物であることを特徴とする光学部材積層体。
- 請求項1から請求項5までのいずれか1項に記載した光学部材積層体であって、前記屈折率調整用区分は、前記粘着剤ベース材料と同じ粘着性材料に該粘着性材料より高い屈折率を有する粒子、ポリマー又はオリゴマーの形態の有機材料が含まれることによって該屈折率調整用区分の平均屈折率を高めるように構成されたことを特徴とする光学部材積層体。
- 請求項3に記載した光学部材積層体であって、前記屈折率調整用区分は、前記粘着剤ベース材料と同じ粘着性材料に該粘着性材料より高い屈折率を有する粒子、ポリマー又はオリゴマーの形態の有機材料が含まれることによって該屈折率調整用区分の平均屈折率を高めるように構成されたものであり、前記透明導電性層の屈折率は1.75~2.14であり、前記粘着剤ベース材料の屈折率は1.40~1.55であり、前記有機材料の屈折率は1.59~2.04であることを特徴とする光学部材積層体。
- 請求項1から請求項13までのいずれか1項に記載した光学部材積層体であって、前記粘着剤層の全光線透過率が80%以上であることを特徴とする光学部材積層体。
- 請求項6から請求項11までのいずれか1項に記載した光学部材積層体であって、前記高屈折率材料の粒子は、複数の粒子が凝集した凝集体の形態で存在する部分を含むことを特徴とする光学部材積層体。
- 請求項1から請求項15までのいずれか1項に記載した光学部材積層体であって、前記屈折率調整用区分は、前記粘着剤層の厚み方向に、不規則な深さで存在することを特徴とする光学部材積層体。
- 透明な第1光学部材を所定パターンの透明導電性層が形成された第2光学部材に接合するための粘着剤層に、該粘着剤層の前記第2光学部材及び前記透明導電性層に面する側において、前記粘着剤層の粘着剤ベース材料の屈折率より高く、前記透明導電性層の屈折率より低い屈折率を有する、透明な粘着性屈折率調整用区分を形成し、
該透明な粘着性屈折率調整用区分が前記透明導電性層及び前記第2光学部材に面し、前記粘着剤層の反対側の面が前記第1光学部材に面する状態で、該透明導電性層及び該第2光学部材上に該透明な粘着性屈折率調整用区分を接合し、前記粘着剤層の前記反対側の面を前記第1光学部材に接合して、前記屈折率調整用区分が、該透明導電性層と前記第2光学部材との間の段差を埋めるように該透明導電性層と該第2光学部材の両方に接する状態にし、
前記第1光学部材を通って入射する外光の、前記粘着剤ベース層と前記屈折率調整用区分との界面における反射光と、前記屈折率調整用区分と前記透明導電性層との界面における反射光とが、光学的干渉により少なくとも部分的に相殺されるようにする
ことを特徴とする光学部材積層体内における内部反射抑制方法。 - 請求項17に記載した方法であって、前記第1光学部材を通って入射する外光の、前記粘着剤層における前記粘着剤ベース材料により本質的に形成される区分と前記屈折率調整用区分との界面における反射光と、前記屈折率調整用区分と前記第2光学部材との界面における反射光とが、光学的干渉により少なくとも部分的に相殺されるようにすることを特徴とする光学部材積層体内における内部反射抑制方法。
- 透明な第1光学部材を第2光学部材に接合するための透明な粘着剤層を備える光学部材積層体の製造方法であって、
透明な粘着剤ベース材料により本質的に形成される粘着剤層を準備し、
前記粘着剤ベース材料より高い屈折率を有する屈折率調整材料の粒子を含む塗工液を準備し、
前記粘着剤層の一方の面に前記塗工液を塗布して、該塗工液に含まれる前記屈折率調整材料の粒子を、前記粘着剤層の前記一方の面から厚み方向に浸透させ、
前記粘着剤層を乾燥させることによって前記塗工液の液体部分を蒸発させる
工程によって、前記屈折率調整材料の粒子が分散状に含まれる屈折率調整区分を前記一方の面から厚み方向に有する屈折率調整区分付粘着剤層を形成する段階と、
前記屈折率調整区分付粘着剤層を、前記一方の面とは反対側の面である他方の面において前記第1光学部材に接合し、前記一方の面において前記第2光学部材に接合する段階と
を含むことを特徴とする光学部材積層体の製造方法。 - 請求項19に記載した光学部材積層体の製造方法であって、前記屈折率調整区分は、前記第2光学部材の屈折率より低い屈折率を有することを特徴とする光学部材積層体の製造方法。
- 請求項19又は20に記載した光学部材積層体の製造方法であって、前記第2光学部材には前記粘着剤層に面する側に所定パターンの透明導電性層が形成され、前記屈折率調整区分は、該透明導電性層と前記第2光学部材との間の段差を埋めるように該透明導電性層と該第2光学部材の両方に接合され、前記屈折率調整区分は、前記透明導電性層の屈折率より低い屈折率を有することを特徴とする光学部材積層体の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580000676.3A CN105190367B (zh) | 2014-01-17 | 2015-01-16 | 具有粘合剂层的光学构件叠层体及其制造方法 |
KR1020157023295A KR101786725B1 (ko) | 2014-01-17 | 2015-01-16 | 점착제층을 가지는 광학 부재 적층체 및 그 제조 방법 |
US14/891,492 US10852455B2 (en) | 2014-01-17 | 2015-01-16 | Laminate of optical elements having a layer of a pressure-sensitive adhesive, and a method for producing such laminate of optical elements |
JP2015526826A JP6266619B2 (ja) | 2014-01-17 | 2015-01-16 | 粘着剤層を有する光学部材積層体及びその製造方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-007310 | 2014-01-17 | ||
JP2014007311 | 2014-01-17 | ||
JP2014007310 | 2014-01-17 | ||
JP2014-007311 | 2014-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015108159A1 true WO2015108159A1 (ja) | 2015-07-23 |
Family
ID=53543042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/051130 WO2015108159A1 (ja) | 2014-01-17 | 2015-01-16 | 粘着剤層を有する光学部材積層体及びその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10852455B2 (ja) |
JP (2) | JP6266619B2 (ja) |
KR (1) | KR101786725B1 (ja) |
CN (1) | CN105190367B (ja) |
TW (1) | TWI558569B (ja) |
WO (1) | WO2015108159A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017014088A1 (ja) * | 2015-07-22 | 2017-01-26 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
WO2017014089A1 (ja) * | 2015-07-22 | 2017-01-26 | 日東電工株式会社 | 透明な粘着剤層を有する透明導電層付カバー部材 |
WO2017014087A1 (ja) * | 2015-07-22 | 2017-01-26 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
US10369768B2 (en) | 2015-07-22 | 2019-08-06 | Nitto Denko Corporation | Cover element provided with transparent pressure-sensitive adhesive layer |
JP2019196468A (ja) * | 2018-05-11 | 2019-11-14 | 日東電工株式会社 | 粘着剤層、その製造方法、粘着シート、粘着剤層付光学フィルムおよび画像表示装置 |
US10569505B2 (en) | 2015-07-22 | 2020-02-25 | Nitto Denko Corporation | Polarizing film laminate having transparent adhesive layer, and display panel |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104391609B (zh) * | 2014-12-17 | 2017-11-10 | 合肥鑫晟光电科技有限公司 | 具有单层ito的触控传感器及其制造方法和触控屏 |
JP6639098B2 (ja) * | 2015-03-20 | 2020-02-05 | 富士フイルム株式会社 | タッチパネル部材、タッチパネル及びタッチパネル表示装置 |
JP6313255B2 (ja) * | 2015-03-20 | 2018-04-18 | 富士フイルム株式会社 | タッチパネル部材、タッチパネル及びタッチパネル表示装置 |
KR102643635B1 (ko) * | 2016-12-06 | 2024-03-06 | 삼성디스플레이 주식회사 | 디스플레이 장치 |
WO2020095415A1 (ja) * | 2018-11-08 | 2020-05-14 | 日東電工株式会社 | 薄ガラス積層体 |
CN113330340B (zh) * | 2019-01-23 | 2023-10-31 | 松下知识产权经营株式会社 | 胶体晶体结构体以及使用了该胶体晶体结构体的发光装置及照明系统 |
TW202045667A (zh) * | 2019-02-15 | 2020-12-16 | 日商日東電工股份有限公司 | 黏著劑層及黏著片材 |
US20230203347A1 (en) * | 2020-03-27 | 2023-06-29 | Nitto Denko Corporation | Method for producing pressure-sensitive adhesive sheet, and pressure-sensitive adhesive sheet |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003131032A (ja) * | 2001-10-23 | 2003-05-08 | Nitto Denko Corp | 粘着型光学部材及び液晶表示装置 |
WO2009133645A1 (ja) * | 2008-04-30 | 2009-11-05 | 東洋紡績株式会社 | 接着性改質基材フィルムおよびハードコートフィルム |
WO2010073797A1 (ja) * | 2008-12-26 | 2010-07-01 | 帝人株式会社 | 透明導電性積層体及び透明タッチパネル |
JP2012035559A (ja) * | 2010-08-10 | 2012-02-23 | Toray Advanced Film Co Ltd | 積層フィルム |
WO2012029536A1 (ja) * | 2010-09-01 | 2012-03-08 | 株式会社日立製作所 | 粘着シート並びにこれを用いた光学部材及び有機発光素子 |
JP2013037057A (ja) * | 2011-08-04 | 2013-02-21 | Nitto Denko Corp | 光学積層体 |
JP2013114344A (ja) * | 2011-11-25 | 2013-06-10 | Nitto Denko Corp | タッチパネルセンサ |
JP2013202844A (ja) * | 2012-03-27 | 2013-10-07 | Hitachi Maxell Ltd | ハードコート基材及びそれを用いた透明導電性フィルム |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52133339A (en) | 1976-05-01 | 1977-11-08 | Res Inst For Prod Dev | Latent adhesive and its production |
JP4640740B2 (ja) | 2000-12-04 | 2011-03-02 | 日東電工株式会社 | 感圧性接着剤組成物、感圧性接着シート及び光学フィルム |
JP4811973B2 (ja) | 2001-01-23 | 2011-11-09 | 日東電工株式会社 | 粘着型光学フィルム |
CN100451684C (zh) | 2004-03-09 | 2009-01-14 | 帝人杜邦薄膜日本有限公司 | 防反射膜及其制造方法 |
JP5252811B2 (ja) * | 2006-05-16 | 2013-07-31 | 日東電工株式会社 | 防眩性ハードコートフィルム、偏光板および画像表示装置 |
JP5564748B2 (ja) | 2007-11-15 | 2014-08-06 | 住友大阪セメント株式会社 | 屈折率調整光学部材用透明粘着剤と光学用透明粘着層及び屈折率調整光学部材用透明粘着剤の製造方法並びに光学用透明粘着層の製造方法 |
JP4756099B2 (ja) | 2009-03-18 | 2011-08-24 | 日東電工株式会社 | 光拡散素子、光拡散素子付偏光板、およびこれらを用いた液晶表示装置、ならびに光拡散素子の製造方法 |
CN102194540B (zh) * | 2010-03-11 | 2013-05-22 | 联享光电股份有限公司 | 具反射光调整层的透明导电叠层体 |
JP2013219065A (ja) * | 2010-08-06 | 2013-10-24 | Sanyo Electric Co Ltd | 太陽電池及び太陽電池の製造方法 |
JP6164302B2 (ja) | 2013-10-22 | 2017-07-19 | 三菱ケミカル株式会社 | 透明粘着材及びフロントライト型画像表示装置 |
JP6234970B2 (ja) * | 2015-07-22 | 2017-11-22 | 日東電工株式会社 | 透明な粘着剤層を有する透明導電層付カバー部材 |
JP6076420B2 (ja) * | 2015-07-22 | 2017-02-08 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
JP6140775B2 (ja) * | 2015-07-22 | 2017-05-31 | 日東電工株式会社 | 透明な粘着剤層及びパターン化された透明導電層を有する偏光フィルム積層体並びに液晶パネル及び有機elパネル |
JP6076419B2 (ja) * | 2015-07-22 | 2017-02-08 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
-
2015
- 2015-01-16 KR KR1020157023295A patent/KR101786725B1/ko active IP Right Grant
- 2015-01-16 CN CN201580000676.3A patent/CN105190367B/zh active Active
- 2015-01-16 WO PCT/JP2015/051130 patent/WO2015108159A1/ja active Application Filing
- 2015-01-16 TW TW104101566A patent/TWI558569B/zh active
- 2015-01-16 US US14/891,492 patent/US10852455B2/en active Active
- 2015-01-16 JP JP2015526826A patent/JP6266619B2/ja active Active
-
2017
- 2017-10-30 JP JP2017208884A patent/JP6644752B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003131032A (ja) * | 2001-10-23 | 2003-05-08 | Nitto Denko Corp | 粘着型光学部材及び液晶表示装置 |
WO2009133645A1 (ja) * | 2008-04-30 | 2009-11-05 | 東洋紡績株式会社 | 接着性改質基材フィルムおよびハードコートフィルム |
WO2010073797A1 (ja) * | 2008-12-26 | 2010-07-01 | 帝人株式会社 | 透明導電性積層体及び透明タッチパネル |
JP2012035559A (ja) * | 2010-08-10 | 2012-02-23 | Toray Advanced Film Co Ltd | 積層フィルム |
WO2012029536A1 (ja) * | 2010-09-01 | 2012-03-08 | 株式会社日立製作所 | 粘着シート並びにこれを用いた光学部材及び有機発光素子 |
JP2013037057A (ja) * | 2011-08-04 | 2013-02-21 | Nitto Denko Corp | 光学積層体 |
JP2013114344A (ja) * | 2011-11-25 | 2013-06-10 | Nitto Denko Corp | タッチパネルセンサ |
JP2013202844A (ja) * | 2012-03-27 | 2013-10-07 | Hitachi Maxell Ltd | ハードコート基材及びそれを用いた透明導電性フィルム |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101819437B1 (ko) | 2015-07-22 | 2018-01-16 | 닛토덴코 가부시키가이샤 | 투명한 점착제층을 갖는 도전성 필름 적층체 |
WO2017014088A1 (ja) * | 2015-07-22 | 2017-01-26 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
WO2017014087A1 (ja) * | 2015-07-22 | 2017-01-26 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
JP2017025205A (ja) * | 2015-07-22 | 2017-02-02 | 日東電工株式会社 | 透明な粘着剤層を有する透明導電層付カバー部材 |
JP2017024262A (ja) * | 2015-07-22 | 2017-02-02 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
JP2017024263A (ja) * | 2015-07-22 | 2017-02-02 | 日東電工株式会社 | 透明な粘着剤層を有する導電性フィルム積層体 |
WO2017014089A1 (ja) * | 2015-07-22 | 2017-01-26 | 日東電工株式会社 | 透明な粘着剤層を有する透明導電層付カバー部材 |
US10023766B2 (en) | 2015-07-22 | 2018-07-17 | Nitto Denko Corporation | Electroconductive film laminate comprising transparent pressure-sensitive adhesive layer |
US10369768B2 (en) | 2015-07-22 | 2019-08-06 | Nitto Denko Corporation | Cover element provided with transparent pressure-sensitive adhesive layer |
US10265927B2 (en) | 2015-07-22 | 2019-04-23 | Nitto Denko Corporation | Transparent electroconductive layer-equipped cover element provided with transparent pressure-sensitive adhesive layer |
US10259193B2 (en) | 2015-07-22 | 2019-04-16 | Nitto Denko Corporation | Electroconductive film laminate comprising transparent pressure-sensitive adhesive layer |
US10569505B2 (en) | 2015-07-22 | 2020-02-25 | Nitto Denko Corporation | Polarizing film laminate having transparent adhesive layer, and display panel |
WO2019216096A1 (ja) * | 2018-05-11 | 2019-11-14 | 日東電工株式会社 | 粘着剤層、その製造方法、粘着シート、粘着剤層付光学フィルムおよび画像表示装置 |
JP2019196468A (ja) * | 2018-05-11 | 2019-11-14 | 日東電工株式会社 | 粘着剤層、その製造方法、粘着シート、粘着剤層付光学フィルムおよび画像表示装置 |
Also Published As
Publication number | Publication date |
---|---|
KR101786725B1 (ko) | 2017-11-15 |
JP6644752B2 (ja) | 2020-02-12 |
JPWO2015108159A1 (ja) | 2017-03-23 |
JP2018072837A (ja) | 2018-05-10 |
TWI558569B (zh) | 2016-11-21 |
US10852455B2 (en) | 2020-12-01 |
CN105190367A (zh) | 2015-12-23 |
CN105190367B (zh) | 2017-04-26 |
TW201542380A (zh) | 2015-11-16 |
JP6266619B2 (ja) | 2018-01-24 |
US20160084991A1 (en) | 2016-03-24 |
KR20150112003A (ko) | 2015-10-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6266619B2 (ja) | 粘着剤層を有する光学部材積層体及びその製造方法 | |
JP6194358B2 (ja) | 透明な粘着剤層を有する粘着剤シート | |
JP6234970B2 (ja) | 透明な粘着剤層を有する透明導電層付カバー部材 | |
WO2017014243A1 (ja) | 透明な粘着剤層及びパターン化された透明導電層を有する偏光フィルム積層体並びに液晶パネル及び有機elパネル | |
JP6076419B2 (ja) | 透明な粘着剤層を有する導電性フィルム積層体 | |
KR20170117201A (ko) | 투명한 점착제층을 갖는 커버 부재 | |
TWI746451B (zh) | 具有透明之黏著劑層的導電性薄膜層積體 | |
JP2017179383A (ja) | 透明な粘着剤層を有する透明導電層付カバー部材 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201580000676.3 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2015526826 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20157023295 Country of ref document: KR Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15736928 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14891492 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15736928 Country of ref document: EP Kind code of ref document: A1 |